Marco Silva admitted Fulham paid the price for some dismal mistakes in their shock defeat by Coventry.
The runaway Championship leaders were beaten 3-1 at Craven Cottage, where they conceded twice in the space of four minutes midway through the first half.
Michael Rose was able to head home Gustavo Hamer’s left-wing corner and keeper Marek Rodak then fumbled Viktor Gyokeres’ shot, allowing the ball to squirm past him and into the net.
And in stoppage time, Callum O’Hare tapped into an empty net after Whites defender Tim Ream had stepped on the ball.
Boss Silva said: “We lost the game because of individual mistakes. It was not something tactical.
“After we made individual mistakes, they punished us; the first goal, second goal and third goal.
“When you make these kind of mistakes at this level it is easy for them to create chances.”
Coventry, roared on by a vociferous travelling support, looked impressive – and could still make the play-offs.
It was an afternoon to forget for Fulham, whose fans made their frustration clear during a below-par performance from their team.
“It was a disappointing afternoon for us; for me, for our players as well, and for our fans,” Silva said.
“I think, overall this afternoon, all of them (Coventry) were better – even their fans were better than ours.
“When you are playing at home, if something is going wrong for us, we football players – our team, our fans – we have to fight against it.
“This afternoon they were on top, their fans were on top as well, and they won the game.”