"I know that he is not happy at all with the attitude and behaviour of the president. He is asking for 20million net every season which is going to be difficult for Real to accept," Calderon told talkSPORT.
"I think the president has all his eggs on the table just in case he can't get the renewal of Cristiano. That is my impression.
"He's afraid at some moment that Cristiano will say, 'I am not going to go on'. That will be bad news for Madrid. I would like to see him retire at Real but now the situation is difficult. Let's see in the next weeks or months if it can be sorted out and he can stay."