Kaka: Man Utd's Ronaldo best in world

World Player of the Year Kaka says Manchester United winger Cristiano Ronaldo is currently the best player in the world.

The AC Milan star said: "At this moment Cristiano Ronaldo is the best player in the world, for the goals he has scored and his quality. He's emerged this season.

"To win the Ballon d'Or depends on many factors. There is also the European Championships."

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