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: Should Aston Villa have been reduced to 10 men against Liverpool? Why Southampton have every right to feel hard done by in their defeat at Wolverhampton Wanderers. And how semi-automated offside technology has hit issues in LaLiga.