21. The player who first wins six games wins the set; except as follows: If both players win five games, the score is called _games all_; and the next game won by either player is scored _advantage game_ for that player. If the same player wins the next game, he wins the set; if he loses the next game, the score returns to games all; and so on, until either player wins the two games immediately following the score of games all, when he wins the set. But individual clubs, at their own tournaments, may modify this rule at their discretion. 22. The players shall change sides at the end of every set; but the umpire, on appeal from either player, before the toss for choice, may direct the players to change sides at the end of every game of each set, if, in his opinion, either side have a distinct advantage, owing to the sun, wind, or any other accidental cause; but if the appeal be made after the toss for choice, the umpire can only direct the players to change sides at the end of every game of the odd or deciding set. 23. When a series of sets is played, the player who served in the last game of one set shall be striker-out in the first game of the next. 24. The referee shall call the game after an interval of five minutes between sets, if either player so order. 25. The above laws shall apply to the three-handed and four-handed games, except as below: 26. In the three-handed game, the single player shall serve in every alternate game. 27. In the four-handed game, the pair who have the right to serve in the first game shall decide which partner shall do so; and the opposing pair shall decide in like manner for the second game. The partner of the player who served in the first game shall serve in the third, and the partner of the player who served in the second game shall serve in the fourth; and the same order shall be maintained in all the subsequent games of the set. 28. At the beginning of the next set, either partner of the pair which struck out in the last game of the last set may serve, and the same privilege is given to their opponents in the second game of the new set. 29. The players shall take the service alternately throughout the game; a player cannot receive a service delivered to his partner; and the order of service and striking out once established shall not be altered, nor shall the striker-out change courts to receive the service, till the end of the set. 30. It is a fault if the ball served does not drop between the service line, half-court line, and service side line of the court, diagonally opposite to that from which it was served. 31. In matches, the decision of the umpire shall be final. Should there be two umpires, they shall divide the court between them, and the decision of each shall be final in his share of the court. ODDS. A _bisque_ is one point which can be taken by the receiver of the odds at any time in the set except as follows: (_a_) A bisque cannot be taken after a service is delivered.