"There was a big gap last year but it was bridged that night because of how much we wanted to win it and how much the crowd was on our side," said Carragher.
"I'm sure Chelsea did turn up believing they couldn't lose but after hearing the crowd that night I knew we wouldn't lose. Our supporters want to see Chelsea lose - and that brings out the animal in them as well.
"I knew before the game it was going to be special. We had the thing with Mourinho in the Carling Cup Final and the gesture he made to our fans and the Stevie Gerrard stuff.
"That all boiled up to wind our fans up and that helped to create a tremendous atmosphere. I think it will be difficult to surpass that feeling and the atmosphere of a semi-final in a group game.
"But there's no love lost between our fans and the Chelsea fans and their club, particularly after what happened with Stevie again in the summer. I'm sure it will be another cauldron of an atmosphere.
"We've had a few nights like it before, Gerard Houllier's comeback game against Roma and the Juventus match in the quarter-finals, games that you'll never forget. We wanted to score early and that's what we did but then they put us under a lot of pressure.
"You want to score early but it did affect us because from then on there was a little bit of fear of losing it.
"One away goal would have made all the difference. We were hanging on and then suddenly we got to the end and there were six minutes of injury time. Six minutes? Where did that come from? But that was where the fans really played their part to carry us over the line."