Assistant referee (association football) in the context of Video assistant referee

In association football, the referee is the person responsible for interpreting and enforcing the Laws of the Game during a match. The referee is the final decision-making authority on all facts connected with play, and is the match official with the authority to start and stop play and impose disciplinary action against players and coaches during a match.

At most levels of play, the referee is assisted by two assistant referees (formerly known as linesmen), who advise the referee on whether the ball leaves the playing area and any infringements of the Laws of the Game occurring outside of the view of the referee. The final decision on any decision of fact rests with the referee, who has authority to overrule an assistant referee. At higher levels of play, the referee may also be assisted by a fourth official who supervises the teams' technical areas and assists the referee with administrative tasks, and, at the very highest levels, additional assistant referees and/or video assistant referees. Referees and other game officials are licensed and trained by its member national organisations.

A corner kick, commonly known as a corner, is the method of restarting play in a game of association football when the ball goes out of play over the goal line, without a goal being scored and having last been touched by a member of the defending team. The kick is taken from the corner of the field of play nearest to the place where the ball crossed the goal line.

Corners are considered to be a reasonable goal-scoring opportunity for the attacking side, though not as much as a penalty kick or a direct free kick near the edge of the penalty area.