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: Fulham were furious when Josh King's goal was ruled out at Chelsea, while Manchester United's late victory over Burnley came courtesy of a penalty.
Chelsea 2-0 Fulham
Possible foul: Muniz on Chalobah before King goal
What happened: Fulham took the lead in the 21st minute when Josh King scored on the break, but as the players celebrated, the VAR, Michael Salisbury, looked at a challenge in the buildup with Trevoh Chalobah laid on the floor in the Fulham half.