Barcelona president Joan Laporta says they cannot let their chance to win the Champions League slip by.
Ahead of tonight's clash with Manchester United, Laporta said: "I believe a lot in this team and we realize that we cannot let this opportunity pass.
"We are not contemplating defeat. Although, we have already won a lot this season."
Asked if Lionel Messi is up for a big game, Laporta smiled: "Of course, Messi is the best in the world."
And he concluded: "This is a very special moment for the club, with over half the team from the juniors it is a source of pride for us."