Fulham boss Martin Jol has spent the week rebuilding his players' confidence ahead of tonight's clash with Manchester United.
Jol believes his side need to regain the confidence they showed during a recent good run.
"You need a lot of belief in yourself to win there," the Dutchman said. "Look at Crystal Palace in the cup, they did ever so well.
"Maybe it is [the biggest challenge in the Premier League] now because they are top of the league, but I can imagine over the last couple of years Chelsea were probably the number one in England.
"Then Man United won the league so it varies, but it is a big game.
"It is one of the biggest games for a club like Fulham, but even when you go to Chelsea or even Arsenal they are probably the same.""My old team Ajax beat them and Blackburn have beaten them so that is the feeling you need. You need to feel you're in with a chance otherwise you may as well stay here in London.