Real Madrid star Ronaldo fires warning at Barcelona

Real Madrid star Cristiano Ronaldo has fired a warning at Barcelona ahead of next month's El Clasico.

Barca have won the last two titles, but Jose Mourinho has overhauled the way Madrid play this season and Ronaldo is confident of beating their great rivals.

"Barca is always a difficult rival, but this year's Madrid is not the same as last year's, it is completely different," the former Manchester United winger told Marca.

"We have changed in many ways, in terms of discipline, playing style and aggressiveness. We all play for the same goal."

"Mourinho is a great coach with enormous experience, he knows what you have to do to win."