fourth official
The fourth official is an important role in sports, particularly in soccer. This official assists the referee and the assistant referees by managing various aspects of the game, such as substitutions and timekeeping. They are positioned at the sidelines and help ensure that the match runs smoothly.
In addition to overseeing substitutions, the fourth official also communicates with the referee about any issues that arise during the game. They may display the amount of added time at the end of each half and can also act as a liaison between the referee and team managers, ensuring that the rules are followed.