West Ham United boss David Moyes was left infuriated after VAR failed to correctly spot the ball leaving the field of play immediately before Manchester Uniteds equaliser on Saturday night.
The Hammers raced into a first half lead thanks to Tomas Souceks predatory finishing skills from a Declan Rice flick-on, but the hosts should have been further in front before an impressive United comeback resulted in a 3-1 defeat.
Jarrod Bowen, Pablo Fornals and Sebastien Haller were all guilty of squandering glorious chances, with United making them pay after the introduction of Bruno Fernandes.
David Moyes remonstrates with the officials after Manchester Uniteds equaliser was allowed to stand
But just before the Portugal international fed Paul Pogba to curl home a wicked strike, Dean Hendersons clearance appeared to drift a few yards over the touchline before curling back in.
Despite checks from VAR officials in Stockley Park, Moyes was left incensed as the goal was allowed to stand and the game subsequently turned on its head.
Moyes told talkSPORT: So whose job is it do that? Its the linesmans isnt it?
His first job is to look. He says he turned away because he was looking for an offside; the first thing to do is see if the ball was in play or not.
VAR could not determine whether or not the ball crossed the line
Replays appeared to show the ball was several yards out of play
The ball was over my head; I was probably in the best position of anybody, I was on the touchline.
The ball was over my head and out! And I think you see the reaction of the players who were all sort of turning away, weve nearly turned off completely.
We were amazed he did not put his flag up for the ball being out of play.
The linesman correctly ruled out Bowens first half volley after he had strayed into an offside position, but West Ham had plenty of opportunities to increase their lead.
Sebastien Haller was one of several West Ham players guilty of missing glorious chances
Fornals passed up two great chances to score, while Haller managed to round Henderson only to slip when he should have slotted home.
After three wins on the trot, Moyes was disappointed to see a lack of cutting edge from his players against Ole Gunnar Solskjaers side.
I thought we deserved more after the first 15 minutes of the second half as well, he added.
I thought we played really well and the disappointing thing was that we didnt get a second goal when we were on top.
West Ham’s Sebastien Haller on the mood around the club, having fans back at London Stadium, and challenge of facing Manchester United
Manchester United have got players who are capable of hurting you, but we didnt expect it to be a decision that hurt us like that one tonight.
We have been fortunate in recent games, weve picked up some decisions which have gone our way. But this one was a strange one the ball was out.
Perhaps the most important takeaway from the game itself was the fact fans were allowed back into the London Stadium for the first time since a 3-1 victory over Southampton back in February.
Although there were only 2,000 home supporters in the ground, they immediately energised the team and there was simple pleasure to be had in just hearing the genuine boos aimed at Edinson Cavani when he went down looking for a free-kick, or the authentic jeers towards Pogba for a poor touch by the edge of the pitch
The sight of fans back in the London Stadium for the first time since February pleased Moyes
I think the crowd were great, Moyes continued. They got really behind us.
But I think that the players played really well and I hope they enjoyed it. I mean, I know we wont have enjoyed the result and maybe the way it sort of petered out at the end.
But overall, we have to say that we kept going and the third goal was the killer because even at 2-1 we were still right in the game.
But the third goal just made it that more difficult.