He said: "Gerrard is a key player for us, and when he scores the winner in the semi-final maybe Chelsea will see even more how important he is for us.
"It is not just about one or two players. We have players of quality who can change a game, and we must play as a unit.
"But when you have Torres or Gerrard, and you are not playing well, the team know that these players can score to get you out of a problem.
"We have a lot of confidence because we know Torres can create something."