Manchester United suffered their first domestic defeat under Ole Gunnar Solskjaer on Sunday afternoon.
The Red Devils visited Arsenal in a game that saw the two sides fight over fourth spot.
Before kick-off, it was United who occupied the final Champions League qualifying place but at full-time the Gunners moved into it.
Goals from Granit Xhaka and Pierre-Emerick Aubameyang gave the hosts a 2-0 win and Unai Emery's team are now in the best position to secure a top-four finish with eight games left.
Over the course of 90 minutes, Arsenal arguably deserved the win but their opening goal came after some massive misjudgment from David de Gea.
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Xhaka picked up possession in midfield and released a shot from 25 yards. He cut across the ball with his left foot and sent a powerful, swerving strike towards goal.
His effort completely wrong-footed De Gea, who shifted to his left, before watching the ball fly into the bottom right corner.
Check it out below.
The 'keeper's movement baffled those watching - with many questioning how he misjudged the situation so badly.
He's been so consistent since moving to Old Trafford that a mistake like this was bound to raise eyebrows and following the match, Gary Neville shared his theory on the incident.
The former United defender suggested that De Gea has been far from his best all season and that on-going contract talks could be contributing to his lack of concentration.
"It was really poor from David De Gea. I'm not sure how to explain that. He hits it well Xhaka," Neville on Sky Sports, per the Daily Mail.
"He's got a clear sight of it. It swerves but I've got no defence for him. It's poor from the goalkeeper."
Neville then picked out De Gea's lack of reaction to the strike as proof that he's lacked concentration all season and claimed that 'all the noise of the contract' is behind that.
"His reaction for me; he went to his left but didn't seem to react when the ball went the other way. He's not been at his best David De Gea this season."
"All the noise of the contract. He must have had a lot of noise in his ear," the pundit concluded.News Now - Sport News