What option does the winner of the pre-match coin toss have?

The winner of the pre-match coin toss has the option to choose the side of the court to start set No. 1. This choice is significant because playing conditions can differ from one side of the court to the other due to factors like lighting or wind (in outdoor settings), which can influence how the game is played. By selecting the side, the winning team can position themselves advantageously right from the start, potentially impacting their performance and strategy during the match.

The other options listed do not correctly reflect the choices available to the winner of the coin toss. The choice regarding who serves or the order of warming up is not part of the coin toss decision. Additionally, the selection of the referee is typically predetermined by the sanctions or governing body overseeing the match and not left to the teams involved.