Singles: After each game the receiver then becomes the server.
Doubles: The team that is due to serve in the 1st game of each set decides which player will serve for that game. In the second game of each set the opponents get to decide which player will serve first. The partner of the player who served in the 1st game then serves in the 3rd game. The partner of the player who served in the 2nd game then serves in the 4th game and this rotation continues until the end of the set.