Barcelona head coach Luis Enrique has claimed that his side are likely to "struggle" when they meet Bayern Munich on Tuesday night.
Enrique's side are in control of the Champions League semi-final following a 3-0 victory in the first leg, but the Barcelona boss believes that a complacent approach would be foolish.
"Bayern are world-class opponents and we cannot make the mistake of taking our three-goal lead for granted," he told reporters after Saturday's 2-0 win over Real Sociedad.
"I have no doubt that we will struggle in Munich."
Bayern prepared for the second leg by losing again as Augsburg claimed three points at the Allianz Arena.
