This is something I have thought as well. His legs look like birds legs that bends backwards. That means that it's important to let your children start early with a sport because it seems that you don't need an athletic build to become an athlete.
Sampras posture struck me as strange as well. Like he was spending most of his time hunched over a computer. He was the same height as Federer, but looked several inches shorter.
Raonic has a slightly better serve, Berrettini has a slightly better forehand, about backhand they are practically the same but Matteo has a good slice backhand unlike Milos.
