Is VAR in use for FA Cup games?
VAR will only be used in FA Cup matches held at Premier League stadiums. This means that 22 of the 32 third-round ties will not have the system in place.
Meanwhile the six top-flight clubs facing away games against lower-league opposition this weekend - Newcastle, Manchester United,
Aston Villa,
Brighton,
Sheffield United and
Burnley - will be in the unfamiliar position of VAR being absent from the decision-making process.
This has caused controversy in the past. Newcastle were aggrieved last season when replays showed that one of Sheffield Wednesday's goals in their 2-1 win was scored by a player who appeared to be in an offside position.
However, there was no VAR in operation at Hillsborough and the goal was therefore allowed to stand.