Speculation over the future of the Manchester United ace has dominated the headlines for much of the summer, with a series of claims and counter-claims from the three parties involved.

But United are adamant that Ronaldo, who is under contract at Old Trafford until 2012, is not for sale, and they are not prepared to listen to any offers.

"I suppose they think we have intervened in some way," Calderon told Madrid radio station City FM. "But it's not like that and that's the truth.

"We know that it's something between the player and Manchester United.

"If the player continues to insist that he wants to come and if United will consider letting him go, then we'll ask.

"If the price is right and everyone's happy, then it won't turn sour.

"I prefer not to talk much about him because he is a United player. We are in this situation as passive spectators, but his declarations have provoked a lot of expectation.

"Nevertheless that is not enough because the player belongs to United, a great club that we are friends with, and we don't want to interfere."

He continued: "He is a great footballer. But it is not up to the player nor to Madrid. Manchester don't want to sell him.

"It seems to me that he has become a bit of a 'hot potato' at United. But I don't want to talk about that because what I say could be misinterpreted.

"If it was me, it would make me proud that the big clubs were asking about our players."