Cristiano Ronaldo has said that a shock move to either Barcelona or one of Manchester United’s Premier League rivals is not out of the question.

The Real Madrid superstar has fuelled speculation of a potential move with his latest comments, but he also conceded that it would be “very complicated” to join a Premier League club other than United or Spanish rivals Barcelona.

"It’s a little more difficult,” Ronaldo told the Associated Press when considering whether he could one day join Barcelona or one of United’s rivals.

"There are things that you kind of already have an idea, that to play one day for Barcelona would be almost impossible, or to play for another English club other than Manchester - it’s very complicated.

"But that’s not 100 per cent guaranteed. As I said before, there are no certainties in football.” While Ronaldo has said he is happy with the idea of remaining at the Bernabeu for the rest of his career, he also made it clear that he is open minded to a potential move.

"Everything is open, all leagues,” he said. "I may end my career here with Real Madrid. I’m just being honest. I don’t know what’s going to happen tomorrow.

"If I was 75 per cent certain, I would say so, it wouldn’t be a problem. But I have no idea.

"When it’s closer to ending my contract I’m going to have to make decisions, whether it’s staying at Real Madrid or going to another club or ending my career in a few years,” the 30-year-old added.

"It’s normal. That’s why I’m not worried, because I know that everything has a beginning and everything has an end. I’m ready for that.

"I’m ready to stay at Real Madrid, to leave, to end my career when it’s time. It’s part of my job," he continued.

"These are always difficult questions to answer because we never know what’s going to happen tomorrow. And as a football professional, this is always an unknown, so I prefer to stay in the present.

"The present is good and I’m enjoying being at Real Madrid. But in a few years I don’t know how I’m going to be thinking.”

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