Doubles
A side has only one ‘service’.
The service passes consecutively to the players as shown in the diagram.
At the beginning of the game and when the score is even, the server serves from the right service court. When it is odd, the server serves from the left court.
If the serving side wins a rally, the serving side scores a point and the same server serves again from the alternate service court.
If the receiving side wins a rally, the receiving side scores a point. The receiving side becomes the new serving side.
The players do not change their respective service courts until they win a point when their side is serving.