"If United doesn't want to sell Ronaldo, they can do it, but Ronaldo has said that he would be at the Spanish Giant." said Calderon.
"If Ronaldo wants to leave Manchester, he'll leave. If he wants to stay, he'll stay." he told newspaper AS.
Calderon added that United should be 'proud' to let Ronaldo join the Spanish Champions, a club the winger has admitted he is keen to play for at same stage in his career.
The Spanish giants are rumored to be preparing a package to bring Ronaldo to the Bernabeu, but Calderon has said that Real will not go against United's wishes.
"I don't know if he will play for Real Madrid next season. We will only do what Manchester United want to do with the player," said Ramon Calderon
"We are very good friends with United and they have said many times that they don't want to sell the player, so we can't do anything. If they say sometime that they would like to sell we will be there and will ask," added Calderon
Calderon and United chief-executive David Gill will come face-to-face on Monday at the European Club Association general assembly in Switzerland for the first time since rumours of Ronaldo's departure surfaced.
Source: BBC Sports.