Ball changes, if any, can be made either:
- After an agreed odd number of games. If this is the case the first ball change in the match is to take place 2 games earlier than the rest of the match to allow for the warm-up. A ball change shall not take place at the beginning of a tie-break game. In this case, the ball change is delayed until the beginning of the second game of the next set.
- At the beginning of a set.