"The perfect match will be the one that ends well and takes us to the quarter-finals," he told reporters on Monday. "We have to find the right balance between intensity, strength and haste.
"This match will last 90 minutes so we have to keep our heads and keep our cool, not lose control of the match. We have all seen lots of games similar to this situation but every match has its own peculiarities.
"In the end we have to focus on how we play, but perhaps we have analysed the first leg against Milan more than any other match. Tomorrow is very important, not just for me, but for the club, the fans and the team as a whole."
Barcelona last won the Champions League in 2011.