Uwe Rosler has said that he expects Chelsea's players to underestimate Brentford in their FA Cup fourth-round tie tomorrow.
The League One side will host the Europeans Champions at Griffin Park in the first meeting between the two sides in 63 years.
Brentford's manager told Sky Sports News: "They will take the game seriously. They can only win the FA Cup and the Europa League and a club like Chelsea has to win trophies each year.
"Chelsea will still have an extremely strong team. I still think their players will underestimate us. It's a human reaction. I was as a player the same and I think that is our chance.
"It's a game that you will play against a team that is close and it will be a massive, massive motivation for them too."
Last time the sides met, Chelsea won 1-0 in the third round of the Cup.