Ronaldo is under contract at the Bernabeu until 2015 and there has been speculation he could enter talks over a new deal in the summer.
However, it has also been suggested he may snub an extension in order to force a move, having indicated he was unhappy in Madrid earlier in the campaign.
United have been linked with a move for their former star, who spent six years at Old Trafford between 2003 and 2009, but Ronaldo refused to be drawn on his future following Real’s Champions League exit at the hands of Borussia Dortmund on Tuesday.
“I have two more years on my contract, I am not concerned about that,” he said.
“I want to win wherever I am. That is what I want most, I am not concerned about renewing.”
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