Video Assistant Referee causes controversy every week in the Premier League, but how are decisions made, and are they correct?
After each weekend we take a look at the major incidents, to examine and explain the process both in terms of VAR protocol and the Laws of the Game.
In this week's VAR Review: Why Brighton & Hove Albion defender Pervis Estupiñán should have been sent off at West Ham, and how Everton goalkeeper Jordan Pickford got very lucky against Chelsea.