"It's a club where the only thing that counts is a result, and a result to them is always a win," said the former Barcelona player.
"Sometimes even that is not enough, because you need to play good football as well. The pressure is maybe a bit more on Barcelona because they won it last year and they'll be expected to get a result.
"It will be a very interesting game. It will be a massive occasion down in Barcelona but I'm very confident we can win through.
"Maybe the Barcelona fans will look at it as a game their team should be winning, but I don't care about that. Liverpool are a very big club as well, and I'm sure they won't be too happy at playing Liverpool at this early stage of the competition.
"The Nou Camp is a massive stadium with a lot of fans, but they are a lot of fans who can be very critical. If things aren't going the way they want it, they could get on the back of the Barcelona players, so we can use that."