Why Yoshimura Serve is so effective?

Recently, in the Zen-Noh 2019 Team World Cup, Timo Boll has lost to Maharu Yoshimura 3-0 (11-7, 11-9, 13-11). Yoshimura has won a lot of points directly with his serve.
► Read more: pingsunday.com/the-secret-of-...
His serve is very well known since it's very difficult to read the amount of spin in his serve. Even the top Chinese player has some difficulty with Yoshimura's serve. For example, Xu Xin.
So today, so what is the secret of Yoshimura's serve? Why this serve is so effective?
Special thanks to ITTF. Without their help, we can not finish this tutorial.
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[@pingsunday]

► Read more: pingsunday.com/the-secret-of-yoshimuras-serve/

[@user-jy2sz1jr9p]

Yoshimura Serve is very effective because he brushes the ball first with his head (for additional spin) and then the rubber.

[@pingsunday]

Lol

[@Matheus-nt5vv]

hahaha

[@thomaslapointe7657]

Yeah funnn eee perhaps true...

[@oeungmao1]

not with XUXIN WHY ?

[@SleeplessBrazilLimbo]

clearly genus

[@lavasurfer22]

ITTF rule 2.6.4 states "From the start of service until it is struck, the ball shall be above the level of the playing surface and behind the server's end line, and it shall not be hidden from the receiver by the server or his or her doubles partner or by anything they wear or carry."

[@rranjann]

It is illegal, ball cannot be hidden from opponent at ' any point' after toss.

[@bastooo3]

the thing is - how well can the umpires see it from the side?

[@zoltanzoltan303]

Its not man , a lot of player do it

[@paulbourdess925]

Just because a lot of players do it doesn't mean its legal

[@spintenisdemesa5669]

Totally agree.

[@ChengKerLeDeck]

Illegal? Nonsense

[@conradfisher2563]

His serve is very borderline. The umpires need to call him on it more frequently to keep him honest.

[@tomtimor9789]

"Upside down" serve. Yes, it is upside down, when "professional" does not respect the other people. That is a BUM mentality. And this is not only this particular individual, it is an epidemy. Even Waldner was hiding his serve.

[@infinitt4619]

i truly agree it's almost illegal bro

[@venomop4608]

1:05 Xu Xin exe. Stopped Working

[@DicasdoEdu]

maybe hugo calderano receptive position can see this contact point

[@nulldemokratiezwei7773]

The serve is illegal. This is no "opinion" it is a FACT. In the ITTF rules from 2019 it says: "From the start of service until it is struck, the ball shall be above the level of the playing surface and behind the server's end line, and it shall not be hidden from the receiver by the server or his or her doubles partner or by anything they wear or carry." So it is not a question whether he hides it during the contact point, because the ball must be visible from the moment he throws it upwards till the moment he strikes it. He clearly hides the ball with his head. And it is written: "... it shall not be hidden from the RECEIVER..." So whether the umpire sees the ball or not is not important. It is the receiver who must see it. If the umpire sees it, but the receiver does not, it is illegal. There is no discussion. Yoshimuras serve is illegal, because he hides the ball with his head and the receiver cannot see the ball. The fact, that nearly all top players hide the ball with their head (Ito, Lin Yun Ju, Petrissa Solja, and so many more) doesnt make it legal. It makes them all cheaters.

[@daverbook]

Why make a rule that the umpires are in no position to enforce?

[@curlyfryactual]

@@daverbook so when I'm playing at the club level and my friend decided he's suddenly a pro I can call him out since there's no ump around.

[@hammadabbas7109]

i think the rules said about "not be hidden by servers wear or carry" , thats why yoshimuras serve is legal bacuse h le hid the ball from his head (and it is not the thing to carry or wear😜)

[@sukiantosionno4950]

You make the point👌

[@emmanueldufour7595]

@@daverbook the rule needs umpires to move their chairs

[@SaffireAnimation]

Nicely explained with slow motion. Very good video. Please upload more in same fashion!

[@juanjosebarrera4637]

I can't say how many times I have seen this video to include it in my game which I already do. Thanks for your videos they are good and I like them with subtitles we have like the same level of English. Saludos from Bogota, Colombia

[@teamjurongeast8858]

The name of his serve is called “illegal”? Hey I realised that the other players like Xuxin made the same errors

[@roml8611]

But Xuxin is also famous for his borderline serves, so it's quite fair in the other sense when these 2 players meet

[@macdevignmac1726]

One reason why Yoshimura serve can be spinny is because he jerk the racket at point of ball contact , thus generating great amount of spin with sudden short movement making it hard to read the spin. You can clearly see the jerking from his movement.

[@aathilaliyar2724]

"this is illegal"😅

[@mochipepper]

I could imagine how a left-handed player standing on the same side of the table as Yoshimura would have difficult time seeing the contact point of his serve. Xu Xin's trouble as shown in your video exemplifies this point. Timo Bol's recent loss to Yoshimura is another example. For a right-handed player standing diagonally across Yoshimura probably can see the serves better. But in my opinion, dipping his head while serving appears intentional to obscure the contact point, and thus his serves should be deemed illegal.

[@runnerbaba]

absolut correct

[@G-rish]

Exactly👍

[@etiennecauty6250]

Then Ma long's serve is illegal too

[@daverbook]

As a lefty I can tell you that is very true.

[@ai00436]

It's not should be,it is illegal

[@madehrasooli6224]

thank you for making this video ❤❤

[@Cocoyz]

He is playing against world players in a world competition who never complained about his serve at any point in all his competitions..Do we have here the right to say its illegal? If we do so, then we are far better than the whole world class players and the organization. just some points to ponder....

[@darvan3996]

It just shows how silly that an established sport with an established rule has this kind of a misleading gray area in it.

[@robertmartian]

idiot logic

[@qomarqomarudin7307]

great video .. thanks a lot coach

[@MikeydeLaraCovers]

“This is illegal.” Burying the lead here... 😂

[@aerislol]

It makes me so salty to see that. Many pros have used and still use illegal/borderline serve and he's not the one that we should blame. But I don't have respect for any player having such a borderline serve because I think that it's disrespectful/unfair for the opponent.

[@bakervinci163]

“Borderline” is the key word here. All you have to do is make the contact point visible for a millisecond of time. Nothing in the rules says that the” serve has to be easy to see”. It is a game of deception, tricks and psych, along with skill and endurance. The better player pretty much always wins. This rule is subjective and he is already in the head of every opponent. The amount of time required to perfect this serve is crazy. I say, train and work hard and let your playing talk.

[@bernardoferrero9647]

@@bakervinci163 completely unrelated to ping-pong here, his serve reminds me of James harden foul baiting moves as they are also borderline illegal moves and, in my opinion it's should be used until it's called against otherwise. Players at whatever sport always try to get an edge in sport either by being athletic, smart or any other talent that characterizes that one player, that being said if his serve is what characterizes him and when it starts getting called against him, he will probably try to find another way to get an edge on his opponents. This is, of course, my opinion. :)

[@bakervinci163]

@@bernardoferrero9647 I’m pretty sure I agree with you. I don’t see any difference in making the serve look as if it has underspin, when it actually topspin and I can’t for the life of me, see how it is “disrespectful to the other player”. As a matter of fact, it shows that you respect him even more. The rule says you can not hide the contact point; so that means, at the point of contact the opponent and the umpire must be able to see the ball at contact. It says nothing about how long that they have see it and they certainly don’t say it has to be easy to see. This serve is super hard fo pull off and this player has worked countless hours, to learn this facet of the game. Kudos to him.

[@lavasurfer22]

​@@bakervinci163 ITTF rule 2.6.4 states "From the start of service until it is struck, the ball shall be above the level of the playing surface and behind the server's end line, and it shall not be hidden from the receiver by the server or his or her doubles partner or by anything they wear or carry." It states that the ball cannot be hidden at any point from the moment the ball leaves the hand to the moment of contact with the racket ("From the start of the service until it is struck," "it shall not be hidden from the receiver by the server").

[@RatatRatR]

@@bakervinci163 You're misunderstanding the rule. As lavasurfer22 points out, the ball is supposed to be visible to the opponent from the time you toss it up. Hence his serve is illegal before he even gets to the contact point.

[@yasinhenfs4540]

"This is illegal. And this is the main reason that his server is very effective." BRUH haha 1:46

[@abhisheksrivastav1951]

Thanks for the video

[@michaels3708]

NOT SURE WHY WE ARE PICKING ON YOSHIMURA; look at Xu Xin or many many many other players and freeze frame during flight or at contact and the ball is not in sight!

[@arnoldcondoricutipa2229]

Muchas gracias pastor

[@unded6094]

Can you make a video for the correct technique for chopping and moves to intervene with chopping and the technique for backspin

[@AinoRonda]

PingPong fan is here. Nice to know this serve

[@LosoIAm]

I thought the rules were changed a long time ago about serving - one of which is open palm; the other one is once tossed, the opponent is supposed to be able to see the ball. I can only see it in slow motion. I gave up TT a long time ago due to failing eye-sight; not sure what the new rules regarding serves are! Many thanks for a great video.

[@solideomusical]

How long did you play for?

[@Liker0307]

Hello, could you please give me the links to the original videos of Yoshimuras service practice? Thank you very much

[@hamidhamdane6431]

Thanks for the video , i think if the opponent can't see the contact point , he probably would protest , and the empire will pay more attention

[@m.alexandrecastro9323]

Coach EmRathich is absolutely correct in everything ! It's a borderline serve just like many, many players (in terms of hiding) ! I was particularly interested in this topic because I have a similar serve (but I am not Maharu !). The difference is that I don't use my head in front, this requires a lot of training since one must be sooooo precise with perfect timing ! What makes this serve deadly is the fact that the execution is LIGHTNING FAST using an exact similar motion. Just like a magician with a deck of cards, his hands move the same way but the cards move differently. In my case, opponents complain very often about being a net-ball, because the kick serve sometimes is soo fast (when they expect an underspin serve) they DON'T understand why... and figure it must of clipped the net ! Conclusion: this is a purely tactical strategy against top players (the head hiding) because until he's told he cannot do it ....HE JUST WON'T CHANGE IT! There was a Polish national player that he would kill everyone with his serve "while laying his left arm and body practically on the table and serving under his body. When the new rule kicked in he quit. I am also curious, if we start making everything illegal then what is fun about our game ?! Just be creative within the rules. Also if you SNAKE a ball........ should that be illegal because you don't see it ?! Or hit the ball from behind your back ? I think that it is spectacular and that becomes very attractive to watch. Just like in other sports ... "dribbling" in soccer is a way doing : "Now you see it now you don't !" - and people like to see that !!! If we start making rules that referees cannot act accordingly then it becomes chaotic .. like some matches that I have seen where the Ref keeps taking away points from the players, just ridiculous. BTW, if Maharu would serve without the hiding of the head against a "normal good" player, him the opponent WOULD STILL MAKE A RETURN MISTAKE, GUARANTEED ! ... he is just VERY FAST. (Sorry if I was a bit long... but I hate this service rule which nobody can judge properly) P.S. I love our game

[@pingsunday]

Exact !

[@aerislol]

Hiding your spin to win your serves is fun? He's absolutely not the only one who does it but he does it so well that even pros can't return. Those rules exists because an illegal serve is way harder to return, I don't see why you're happy about that

[@paulbourdess925]

It seems like a few people read the rules on serves. The ball is to be tossed upwards, and not to be obstructed by body or clothing. Its not even just the point of contact that can't be obscured. But really only Samsonov serves properly at the pro level, at least consistently.

[@hamleewan879]

Great thanks for your explanation. Illegal or not, i think, camera could be installed on the on the adverse player to show it It's impossible for the umpire to see that

[@bakervinci163]

Isn’t this just an aggressive reverse pendulum ?

[@nicu_danciu]

Excelent!

[@2badger2]

Great slow motion view of his head blocking the other player from seeing the serve ... Good job and thanks for sharing.

[@Mateus.007]

Hey EmRat,The hardness of backhand rubber always has to be FH - 2 (ESN scale)? How to compare que hardness of the rubbers since each one has different scales?

[@pingsunday]

There are 3 hardness scale in table tennis. I will explain in in another videos.

[@richardj6593]

Coach, please show exactly how he is striking the ball for topspin and underspin. Where on the racket and the balls flight path.

[@richardj6593]

Actually he comes under ball on both spins. Top it rolls down face and side under it is hit with small reverse pendulum motion. Watch it slow motion again

[@richardj6593]

@PlayerGamer427 _ mmm. Not really

[@mobiusnnaito2543]

hello coach, talking about secret..can you talk about dhsW968?people are getting crazy talking about it eventhough the prize is expensive..whats the difference between w968 and dhs long 5?i heard w968 more softer,slower and more dwell time than long 5

[@nashrullohs]

Excellent

[@pingsunday]

Thank you! Cheers!

[@sochivykhieng8805]

I have noted many comments saying this serve is illegal so I am really wondering why it has been allowed to play for so many games at international levels? Were all those games illegal then and we all watched unfair games and competitions??? Are those umpires not qualified??

[@daverbook]

I don't think there is ever an umpire behind the receiving player. So how could an ump even see that the serve is hidden, since he/she can only see the server from the side??

[@veereshramnarine5654]

What are the advantages of reverse vs forward pendulum serves? I can only serve forward pendulum but see that most top players use reverse.

[@solideomusical]

Reverse pendulum resembles a lefty serve.

[@auroarake248]

yoshimura is a revolution in table tennis!!!!

[@congphanquoc4336]

Có phải trang yt của Việt Nam ko, tại sao ko có phụ đề tiếng Việt

[@TheKromside]

Thanks for ur video! Regards from Chile

[@dmitrikonnov922]

The biggest problem is the rule itself. It says you're not allowed to hide the ball from the opponent, but how can the umpire see that so clearly while sitting aside the table? Secondly, what if the receiver goes to the right corner, so that he can't see the tossed ball any longer? Should then the serving opponent adapt his serve? Maybe we'd need some rule changes and some slow-motion cameras to judge on every serve unprejudiced immediately during the match. But one more question? Why do you care so much about the serve rules and so little about the booster rules?

[@philippelepage1609]

Thank for your video. A tiny remark: you don't need to add the background music/noise.

[@hasalin76]

the ball must be seen for as long as it is in the air... 100% illegal

[@daverbook]

Ther are different levels of illegal; toss, toss height, contact. The most illegal is contact where the opponent cannot see the ball because it is hidden.

[@xubairhanif963]

The contract point isn't hidden... The racket face is hidden except the top where ball make contact... This makes it difficult to see the skin angle

[@sour-diesel9233]

And I thought I had a good serve. Great video as always coach :D

[@malypetu1409]

I can't entirely agree that his serves are illegal; they are probably closest to but definitely not illegal. The video clearly shows he covers the ball but not at the moment of impact, which is what decides the legality. The serves are very spiny, but its strength comes from his deceiving strategy at the very moment when it touches the ball.

[@rockys7726]

I need to develop a serve that's borderline. I will win a lot more matches because my serves now are too legal....

[@oeiwintoro2107]

Its jenius....

[@darylreytorreda3892]

If you're a left handed player, then you sometimes won't see the contact of the ball. But if you're a right handed, then you may see the contact a lot of times.

[@zoltanzoltan303]

Pls do for left handed olayers video (strategy)

[@YuTanBu]

Salah satu servis yang bagus..

[@brussjona]

Que dice Xu Xin en el segundo 0:48 ?

[@lucagianotti1346]

Dear EmRatThich, it's very important what you do. Please analize Ovcharov serve too. In the same Zen-Noh 2019 Team World Cup against Harimoto, Dima was serving with a parabola that was really far from being vertical... for me is illegal, but I woud like your opinion!

[@pingsunday]

You are right Luca. I have explained in the video "serve fault". Ovtcharov serve is illegal I think. But it is very subjective

[@Luckma1]

the angle of the serve should be straight to not give extra power to the ball. Ovcharov throws the ball really high ( above head), therefore the angle has not so much effect. There are other players that only throw the ball about head high, start at the middle but contact at the side of the table. There the angle has much more effect.

[@Nezeus1104]

If you watch the timo ball vs yoshi game, at some point tosses the ball towards him which I think adds more spin to the ball. He just hides the ball while the ball drops. Dimi’s serve is visible throughout the entire serve. They are both illegal

[@Luckma1]

@@Nezeus1104 if you take the rule how its written yes. If you take it as what is supposed to be supressed by it then I dont think so. Dimis ball dont get much extra spin with his serve.

[@daverbook]

yeah, there's that ratio thing between the height of the toss, and the horizontal distance traveled.

[@jordimoens2833]

I am a good player in Belgium for my age and I am left-handed. I have a lot of problems with the serves on higher niveau because of the fact that I can 't see it because I am left-handed. They said to me that if the umpire can see the ball it is not illegal but I find this not really fair because I try to serve everytime legal. In this case you see that left-handed players will have a lot of more problems Than right-handed players. I find this not fair as Good player.

[@timmyaz7112]

Just think about right -handed player has more problem seeing the serve from the left handed player

[@dickn.ormous1064]

That's true,but also the right handed players face the same problems against lefties.All in all,I think lefties have some disadvantages in singles.Athough almost 30 percent of pro players are lefties (cause they have major advantage in doubles) the number of lefties World Champions is really very low( only 3 champions in the last 45 years).

[@inquistive]

@Jordi Moens When they said if the umpire can see the ball it is legal, they were wrong!. A serve is legal if the opponent can see the ball all the time after the toss. It is a rule that the server must make sure that the umpire can see that the serve is legal. In other words, the server must make sure his serve is obviously legal, that is what the rules of TT say. The problem is the ITTF, because they don't make sure that the umpires do their job properly. The serving rules are good, the problem is the umpires. I am teaching myself to read the ball after it has been served and not to worry too much about watching the server's action because some people's serves are very deceptive and some people's serves are illegal. So if I can learn to read the spin on the ball it does not matter how deceptive or illegal a serve is.

[@bricecarpentier5817]

Would it be technically possible to achieve a good "upside down serve" while still keeping the ball visible to both the umpire and the opponent at all time?

[@leotrannnn]

Brice Carpentier Yes, and it is called a reverse pendulum.

[@bricecarpentier5817]

Leo Tran is it exactly the same motion though?

[@dmitrikonnov922]

@@bricecarpentier5817 It's NOT exactly the same motion. It differs a bit. In KZbin there's some good tutorials how to make this serve.

[@KangenAlec]

They really need to make a new serve rule, where the ball stays in front of the body at all times. No more serving behind the head or a torso

[@Eric_Smith2662]

This video could have been 20 seconds long and ended after, "this is illegal"

[@darrylkassle361]

If you are wondering what XUXIN said when interviewed he stated in that particular excerpt: "我的觉得他的发球还是非常特点和其他的人不一样"~ " I feel his serve is very characteristic and very different compared to others" As for it being an 'upside down serve' that is very descriptive however I always thought serves were classified according to their spin type as opposed to the service motion I don't know I love pingsunday vids however I just have to comment when I see or disagree about something. I hope he does not take it personally HE probably comes across my comments and thinks there's that prick again.

[@pingsunday]

Thank you very much for your clarification.

[@darrylkassle361]

@@pingsunday no worries

[@TableTennisHero]

ITTF needs to enforce strict rules. There should be post match video analysis. Not just Yoshimura, but many players cheat including Chinese. And why is tuning/boosting of the rubbers still allowed ? They should ban all the players who boost their rubbers.

[@nacho.m.f]

It's called reverse pendulum serve actually

[@marcosmusixpcmusicam]

I dont see the ball hide at the contact point...

[@phantn]

Because you are not blinded by chauvinism. Simple.

[@user-lq6mq6uu4h]

Good

[@marcop174]

Xu Xin and Timo Boll are both left-handed players! Do right-handed players have the same Problem with this serve?

[@kobekobe2634]

ILLEGAL !!!

[@nicholasunknown9902]

Coach, there is a new talented Japanese player Uda Yukiya. In my humble opinion, I believe that he has one of the most powerful forehands on the Japanese team. Please look him up. Thankyou.

[@nithinkumar8062]

Thanks a lot for ur videos

[@mcocplayer26]

If serve is illegal why don't xuxin takes objection about it?

[@sadikijeje4161]

THIS IS ILEEGAAAL🤣🤣

[@user-fg9fb2nq3n]

His serve is legal, because players and umpires are on the floor of the court. But camera of these videos are located above players and umpires head. Those cameras are set outside court and as a matter of fact, cameras are about 3 meter high or higher. Therefore cameras are looking down on players. In my opinion, those cameras should be attached on umpires forehead(like mining worker), so nobody is fooled by camera angles.

[@magnusheym7231]

His serves unpredictable and so scary

[@jacquelineshlau3669]

Reminds me how Waldner served in his early days (champion, haha). He had his left arm right in front of the contact point. May be that why the rule was changed, lol. Umpires should attack this flaw. Seen many times even the world class players DO NOT stick to vertical tosses.

[@robertvujasic8945]

at that time his serves were perfectly legal and if you look at matches from 21pt/set era, everyone was very obviously and unapologetically hidding serves. the reason they made it illegal since the switch to 11pt/set system is because there would be almost no rallies in such a short set

[@phuthanhtran2958]

What an effective and interesting serve. I would like to learn Yoshimura's serve.

[@PJ-kg2pw]

Why no one call the fault on his serves?

[@zorro7572]

Not only this is heavy underspin serve but this is also heavy illegal serve.

[@Rex-go1nq]

If it’s illegal why ITTF have not banned this serve.?

[@ikarusxv]

The question is not why it's so effective, the question is why referees don't consider it illegal

[@jonneville2287]

If the opponent can't see the contact, then it is illegal, but the player should say so to the umpire, because from the umpire's viewing angle, it may look legal. Many players also don't throw the ball up vertically either, which is technically illegal as well, but many umpires let it go, as long as it isn't blatantly obvious. It depends on the umpire - some practically shut down a match, because one of the players is hiding contact, not throwing vertically, or throwing the ball over, or in front of, the base line, but can't seem to serve any other way. This is where the coach should have stepped in to correct the problem, before it becomes ingrained. I use the Hook serve, which is difficult to do if throwing the ball perfectly vertical, so if the umpire repeatedly calls a foul, I can switch to my backhand serve, which I can throw vertically. You must have a back-up serve, with a perfectly vertical toss, just in case you get a pedantic umpire.

[@solideomusical]

If it is illegal and the referees don't call it why don't his opponents complain about not seeing the contact point?

[@carlosgomez-hs8bw]

if irs illegal why dont they punish him?

[@wingtolau6553]

Like many other sports now, with CTTV, umpires should call time out and scrutinize dodgy serves then make appropriate decisions. That'll stamp out ALL illegal/borderline serves.

[@procycloneco1374]

I will name this Ultra Hyper Head Serve...more cool name thou

[@michaelvanna8982]

Illegal with referee?

[@markchandler7089]

Very interesting. Left handers have more difficulty with this angle. The umpire can see the contact. The sport needs a service judge as in badminton because one viewpoint is insufficient.

[@timmyaz7112]

This is reverse pendulum serve but he flicks the head of the racket up after the contact point instead of continue moving to the right like everyone else .

[@jcjensenllc]

1:10 ILLEGAL SERVE. The ball is obscured by his head. RULE: the ball has to visible to opponent the entire time. Yes, illegal serves are usually more effective.

[@Belgamor77]

The name of his serve should be Pee-ka-boo!

[@berndmayer3984]

he covers the ball with his face and throws it backwards, not vertically.

[@lfung711]

"the service is legal or not" feels like how to call a foul in soccer or basketball game players sometimes need to play inside the grey area to get more advantage in the competition

[@bakervinci163]

Just because he makes it hard to see, doesn’t make it illegal. I can see the contact point on this video. As long as the umpire can see the contact point, he will not call it, according to the international umpire I know.

[@dieguinhodopandeiro497]

Just in the Limit

[@kdgr]

🏓👍

[@Ali_Shafai]

I disagree with the statement that the contact point is behind his head. During the video when this claim was made you can clearly see the actual contact happens right below his chin. So though he starts the motion and at a certain point in time the ball is behind his head, the actual contact point is right below his chin for the backspin serve. and, we can’t forget the fact that he’s played many many matches at a very top level, I’m sure an umpire or two would have already called him out on his so-called illegal serves.

[@rdhtyagi]

I don't think the serve is legal. If you see the slow motion at 1:25, you can see that his head is hiding the ball during the flight. The ball comes from behind his head and then he makes the contact. The contact point is definitely visible. But as per rules, the ball should be visible to the opponent during the whole service action.

[@alainjosserand6785]

Clear.

[@masterdstroyer2031]

Its legal, because he clearly release the ball and contact to the racket, its fault by his opponent thats hard to see the spin.

[@Der.Geraet]

Illegal , 51 % because der Referees Sleeping with open eyes, therewhere 49 % legal. The wrist position before contact the ball ist the key ... for the player, which return it (...)

[@bilalyasin1698]

Legal service.His wrist works so fast and swift that the ball does not afford to be touched at a wrong angle.