BERLIN: Barcelona take a 4-0 advantage to Munich but are wary of Bayern's wounded pride when they face the Germans on Tuesday in their Champions League quarterfinal return leg.

Barca coach Pep Guardiola warned their high scoring victory in Spain last week could bring the best out of the German champions, who have called the defeat a debacle and said they have no real chance of qualifying.

"Bayern are capable of scoring four goals, all the more so when they are wounded," Guardiola said at a news conference.