What is the role of the assistant referee during a match?

The assistant referee plays a crucial role in a match by determining when the ball is out of play. This includes making decisions on whether the ball has crossed the touchline or goal line, which is essential for maintaining the flow of the game. The assistant referee's positioning along the touchline allows them to have a clear sight of the play, enabling accurate judgments on whether a ball has completely crossed either line. This determination is vital, as it impacts various aspects of the game, including throw-ins, goal kicks, and corner kicks.

While managing player substitutions, monitoring player conduct, and ensuring that proper equipment is worn are all important aspects of officiating, these responsibilities fall more directly under the jurisdiction of the center referee. The assistant referee specifically assists in key decisions such as offside calls and identifying when the ball is out of play, reinforcing their role as an integral part of the officiating team.