Dani Alves says Barcelona will not be afraid to take risks against AC Milan as they try to overturn a 2-0 first-leg Champions League deficit at the Camp Nou.

The Brazil international says it is time for an 'historic comeback' to add to Barca's impressive record of achievements, and that his teammates must forget about their recent problems off the pitch.

He believes the La Liga leaders have what it takes to knock the Italians out of the Champions League on Tuesday night, and make their way to the quarter-finals of the competition.

"We have been a great team, but we have never completed an historic comeback," he said, according to ESPN.

"Perhaps the moment has come to do it. We will try to win, but if we do not take risks we will not win. We are not afraid."

Alves believes there has been too much talk about their absent first team coach Tito Vilanova and stand-in Jordi Roura's recent problems.

He suggested Barca have a 'mental problem' at the moment, and says it is vital for his teammates to forget about issues behind the scenes.

"When you have negative things around you, it is necessary to close yourself off. If you do not do that, it spreads. Hopefully we have learned our lesson and on Tuesday we will compete like we know we can," he told ESPN.

A win over the Spanish league's bottom side Deportivo La Coruna on Saturday night has given Barca a mental boost, according to Alves, with goals from Alexis Sanchez and Lionel Messi proving the difference at the Nou Camp.

"The objective was to win and to reach Tuesday with a boost of confidence," he added. "We went out to enjoy ourselves. We did what we always do."

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