Manchester United legend Rio Ferdinand has slammed the slack defending by the United defenders which saw Fulham open the scoring at Craven Cottage on Wednesday night.
Ademola Lookman gave the Cottagers a surprise lead after just five minutes as he strode through on goal from an André-Frank Zambo Anguissa through ball.
Ferdinand blamed centre-backs Harry Maguire and Eric Bailly for their lack of defensive discipline.
“It’s a disappointing start. Both the centre-backs are at fault,” the former United man told BT Sport.
“The distance between them isn’t a problem. They can both see Lookman, good positions the problem comes when, for some reason, Maguire feels the need to get over here [towards left-back].
“I understand that if [Luke] Shaw is going out to the [Fulham] full-back, but Shaw stays, doesn’t go out there.
“What that does is create a problem in the back line, a big space there for Lookman to run into, which he eventually does.
“My problem lies with the other centre-back, Bailly, he can see everything in front of him, he can see Lookman, he can see the space, he can see his partner coming away from the danger zone.
“He’s got a decision to make, he should cover, he doesn’t.
“I don’t understand why his arms are out, he plays for offside, how you cannot see that, smell the danger and react to the danger, it baffles me, I don’t understand that.
“The two centre-backs are completely at fault.”
The team turned the game around courtesy of goals from Edison Cavani and Paul Pogba which secured a record-equalling 17-game unbeaten away record.