Technology that automatically detects whether a player is offside is on course to be used at the 2022 World Cup in Qatar and could be in the Premier League by 2023.
The Hawk-Eye system uses cameras to track the movement of both the ball and the players to determine whether a player is offside or onside at the moment a pass is made.
At first, it will work as a semi-automated system which sends a message to the video assistant referee (VAR) who then decides whether the offside player was interfering with play.