How is it determined if a server has committed a fault during service?

The determination of whether a server has committed a fault during service primarily hinges on the position of the server's foot in relation to the service line. If any part of the server's foot touches or crosses the service line before the ball is struck (this includes both the front line and the sideline), a fault is called. This rule ensures that the serve begins from the designated area without encroaching upon the opponent's space prematurely.

While observing whether the serve goes over the net is vital for validating the serve's legality, it does not directly relate to the server's actions regarding faults. Similarly, watching if the ball hits the referee's stand does not pertain to foot faults, and the type of serve chosen by the server has no bearing on whether a fault occurs. It’s essential for players and officials alike to recognize the significance of the server's foot position to ensure fair play in the game.