Real Madrid star Ronaldo winks at Man Utd, Man City: Anything can happen in future
"To be honest, I don't know. In the future, nobody knows," Ronaldo told Sky Sports News HD.
"I feel very happy here, it is a great club with fantastic fans. It's great, but in the future nobody knows.
"I feel happy here but it one year or two, you never know. A man's head is always complicated, but at the moment I am very happy."