Defeat to Fenerbahce would be a "disaster" for Chelsea, admits defender Ricardo Carvalho.

He said: "It would be a disaster to fail at home and I believe what happened last week was an accident.

"We are playing to our best level this season at the moment and can overcome them.

"They play with a Brazilian style because of their coach and it is hard to cope with their movement, but we can win the game and we want to do so convincingly so we are confident for the semi-final."