Can someone call a let after waiting to see if his partner's return is bad? Can someone call a let after waiting to see if the serve was out or was an ace? I suppose if a guy calls a let anytime before the next serve you have to accept it, or is this not the case?
17. Prompt calls eliminate two chance option. A player shall make all calls promptly after a ball has hit the court. A call shall be made either before the player’s return shot has gone out of play or before an opponent has had an opportunity to play the return shot.
Prompt calls will quickly eliminate the “two chances to win the point” option that some players practice. To illustrate, a player is advancing to the net for an easy put away and sees a ball from an adjoining court rolling toward the court. The player continues to advance and hits the shot, only to have the supposed easy put away fly over the baseline. The player then claims a let. The claim is not valid because the player forfeited the right to call a let by choosing instead to play the ball. The player took a chance to win or lose and is not entitled to a second chance.
18. Let called when ball rolls on court. When a ball from another court enters the playing area, any player on the court affected may call a let as soon as the player becomes aware of the ball. The player loses the right to call a let if the player unreasonably delays in making the call.