Condensed version of The Code, governing self-officiated play:

  1. The oldest tradition in tennis is to give your opponent the benefit of the doubt; this means that any ball that cannot be called out with surety is presumed to be good and continues in play. Therefore, no point should ever be replayed because a player is not sure whether a ball was in or out--if you're not sure, then it was in!
  2. All players should cooperate to attain accuracy in making line calls. You are obligated to call all balls on your side, to help your opponent make calls when the opponent requests (!), and to call against yourself (with the exception of a first service) any ball that you clearly see out on your opponent's side of the net.
  3. Any call of out or let must be made instantaneously (that is, before either an opponent has hit the return, or before the ball has gone out of play); otherwise, the ball continues in play.
  4. Don't practice the "two chance" option. (Example: As player B is about to hit an easy putaway, he sees a ball from an adjoining court rolling toward him. B goes ahead and smashes the putaway--but hits the net, losing the point. Then B makes a claim for a let, which is obviously not valid. B could have had a let had he stopped when he first saw the ball rolling towards him, but when he saw it and continued on to hit the easy shot, he forfeited his right to a let. He took his chance, and he is not entitled to a second one.)
  5. Don't enlist the aid of a spectator in making a call.
  6. Don't stall, sulk, complain, or practice unethical gamesmanship. Instead, conduct yourself in such a fashion as to make the match fun for all participants.
  7. No system of rules will cover every specific situation, but following the principles of The Code should, by extrapolation, provide a solution for any problem.

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