Casillas on relationships with C.Ronaldo: he is my friend and enemy © EuroFootball.com

Real Madrid goalkeeper Iker Casillas jokingly, half seriously told journalists about his turbulent relationship with striker Cristiano Ronaldo.

At the beginning of last season, rumors spread that the Spaniard and the Portuguese did not get along, but both denied it and soon publicly demonstrated their friendliness towards each other.

However, harmony does not always prevail: "He is my friend and teammate. But also an opponent, because we argue a lot," Casillas told ESPN.

The Spanish national team player also praised his colleague, who scored as many as 40 goals in the Primera division: "It didn't happen by chance. C. Ronaldo is truly an amazing footballer."