United must defend much better on Saturday than they did in midweek - or else be punished by Fulham's Luis Boa Morte.
That's the warning from Wes Brown, who gave away a penalty during Wednesday's 4-3 defeat at Ewood Park.
"As long as we play how we know we can - and not like we did against Blackburn - then we can win the game," says Wes, previewing Saturday's match at Old Trafford.
"If we're giving chances away, Fulham will take them. That's the sort of team they are. Boa Morte is the obvious danger-man. He's a bit like Louis Saha - powerful, strong and quick. We've got to be looking out for him."
Brown accepts the United defenders had a night to forget against Blackburn, not least when he handled the ball to give the home side a crucial penalty.
"I wasn't expecting him (Steven Reid) to cut the ball back," reflects Wes.
"I always try to keep my hands behind me but when he cut it, it bobbled up and hit my hand. It wasn't intentional but the linesman gave it. It's very hard to come back from 3-1 down at half-time. We paid for our mistakes."