1. 13.2 when one player chooses to serve or receive the service first, or to stand aside first, the other player should have another choice.
1. 13.3 After each score of 2 points, the receiver becomes the server, and so on, until the end of the game, or until the scores of both sides reach 10 or the rotation service method is implemented. At this time, the order of serving and receiving remains unchanged, but each person only serves one point in turn.
1. 13.4 In the first game of doubles, the server determines the starter first, and then the receiver determines the receiver first. In the next game, after the first starter is confirmed, the first receiver should be the player who served him in the previous game.
1. 13.5 In doubles, every time the service is changed, the front-end server becomes the server, and the partner of the front-end server becomes the receiver.
1. 13.6 The player who serves first in one game should receive the service first in the next game. In the doubles final, when one side scores 5 points first, the receiver should exchange the order of receiving the service.
In the game of 1. 13.7, the player in one direction has to switch to the other direction in the next game. In the deciding game, if one side scores 5 points first, the two sides will exchange directions.