I was watching Acapulco and the commentator mentioned some things about the game that could be changed. Which one of these, if any, would you like to see changed from the current rules. A. You have to use the first 2 balls you get from the ball kid. B. No use of towel allowed on court in between points (unless it's a tie-break, let's say). C. No net cords allowed. Actually not sure what he meant by this. Maybe everything goes? I think college tennis tried this once. Or maybe whenever there is net cord, do a replay? D. No trainers allowed for injuries in the middle of a match.