more than agree that - especially in the US - the coaches are too obsessed with the technique. Not to mention they are often not even on the biomechanical level right. Mostly based on “I watched hundreds of top pros slow motion videos” argument. But then they make video analysis comparison student vs. Federer using videos taken from different angle than the template… But then look for example on the Czech girls (30x smaller country) and their results. I can assure You they don’t spin around technique but: playing patterns and compete (mental approach)…