A decision that cost Raphael Varane his first Manchester United goal has sparked calls for VAR change.
During an encouraging opening against Burnley in their most-recent Premier League game, United saw two goals ruled out - one after intervention from the much-maligned video replay system.
Paul Pogba did put United in front on 18 minutes with a sharp finish.
However, either side of that strike from the World Cup winner, France teammate Varane nodded past Nick Pope and Burnley midfielder Josh Brownhill turned into his own net, but the rock-bottom Clarets were handed a double reprieve before equalising upon the restart.
From a United perspective, those two refereeing decisions cost them dearly at Turf Moor.
Harry Maguire was deemed the guilty party for the first of those as he blocked Jay Rodriguez at a set-piece.
Despite some controversy at the time, United have been told that was the right call, but the process needs to be adjusted to include a VAR time limit.
Speaking to Football Insider, ex-FIFA and Premier League referee Keith Hackett said: "It's the correct call, but loses its value when a decision takes so long. I'm almost getting to the point where I'm thinking VAR should be timed.
"I already think VAR should be at the ground and there should be a post-match review.
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"I just think there needs to be a time on it, whether it's 15 seconds or 30 seconds, then it's gone.
"If you can't make your mind up, the decision stands. Long pauses cause everyone to doubt themselves - including referees. This was an easy decision that took far too long to confirm.
"Hopefully this is another example that could change the law in future."
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