Manchester United boss Erik ten Hag says an error led to Fulham's winner on Saturday.
Alex Iwobi struck Fulham's winner nine minutes into injury-time after Harry Maguire had equalised Calvin Bassey's opener for the visitors.
"It was a throw-in [for Fulham] in the corner, we had them under pressure and we have one player in the wrong position," said Ten Hag.
"As a team we should manage that and make sure everyone is in the right position. We let them escape and it is avoidable.
"The team showed big character to fight back, we deserved the equaliser and went for the win - we showed big personality and character. It was that mistake. Before that we went for the win and we should have taken our opportunities.
"We struggled with their influence and their impact on our left side. But we reacted well and how to deal with it, how to step up from the back and once we had that we got more from the game and took control to create the chances.
"With the squad we had today we should have won this game. Both halves were slow starts and we should be ready from the first whistle.
"That's a point of criticism but the team showed big character in both halves."
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