Which responsibility does NOT belong to the Second Referee?

The responsibility that does not belong to the Second Referee is watching for foot faults on the server. This task is specifically assigned to the First Referee, who has the vantage point to closely observe the server's feet and ensure they do not cross the serving line before contacting the ball.

The Second Referee, on the other hand, has distinct duties that focus on the players on the court. This includes determining the alignment of players on the receiving team and ensuring they are correctly positioned at the time of serve. Additionally, the Second Referee is responsible for overseeing the entry of substitutes onto the playing area, ensuring that substitutions are made in accordance with the rules and at the appropriate times.

This division of responsibilities allows for a more organized and effective officiating system, ensuring that all aspects of the game are monitored and that rules are enforced properly throughout the match.