"Rafa knows them and the Spanish league better than anyone and that will make them a little bit wary when we go there," said the Liverpool skipper.
"We would love to go there and win, we are not a team that goes anywhere to play for a draw. But it would not be a bad result for us.
"A lot of our lads have plenty of experience of playing in the Nou Camp, so there is no fear factor.
"We have been waiting for this game for ages it seems, and now it is almost here we know that a positive result would set us up nicely when we bring them back to Anfield for the second leg.
"We have had some great games against them in the past and I am sure this will be another one."