Cristiano Ronaldo claims to be 'very happy' at Real Madrid, but admits he cannot guarantee that he will see out his career with the Spanish giants.
The most expensive player in world football has spent the last three years at Santiago Bernabeu, having completed an £80million move from Manchester United in 2009.
The Portugal international has provided full value for money, with a remarkable strike rate seeing him net 146 goals in 144 appearances.
He found the target on 60 occasions in 2011/12, with his efforts helping Jose Mourinho's Real to snatch the Primera Liga title back from arch-rivals Barcelona.
Ronaldo admits he could not be happier in his current surroundings, with it his opinion that he is in the ideal place at this stage of his career.
He is, however, still only 27 years of age and concedes that there is a chance that he will look to take on a new challenge at some stage in the 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."
You can see the full interview with Ronaldo on Good Morning Sports Fans from 6am on Friday.