Sergio Ramos has told realmadrid.com that Barcelona were lucky to win three titles last season.

Barcelona won an unprecedented treble of trophies by winning the league title, the Spanish Cup and the Champions League title.

But Ramos feels Barcelona might get complacent this season.

"They were lucky to be rewarded for their efforts with three titles last year," said Ramos.

"And that may make people believe everything is easy for them. But each team has its own style."

Barcelona may be without the inspirational duo of Lionel Messi and Zlatan Ibrahimovic on Sunday, but Real may welcome back Cristiano Ronaldo to boost their attacking options. Ramos feels his team's offensive power is much stronger than the Catalan side.

"We may be better than them in attack and at counterattacking. They may be better in midfield because they have players that truly make a difference in that part of the pitch."