I play USTA matches when I play long matches the one can per match can affect the level of play. Especially on a slow rough court where get fluffed up and worn out. I have had balls go out flat on me. I have even lost balls in my indoor courts. Do you think USTA should allow a new can to be opened at the player(s) choice? What do you guys think ? Also should they have USTA approved balls only I normally play Penns and I hate playing other balls like Dunlop.