Amelie Mauresmo
Banned
John Isner has the game to go deep at the US Open yet I am shocked he only reached a slam quarterfinal once in his career. Isner yes he got a big serve but he volleys well and he is good at the net. Yet John's return of serve is poor why? I have seen Isner matches and it seems like he tries too hard to hit a big shot and usually the ball goes out. If you were coaching Isner how would you help him improve his return of serve?