"If the kid keeps himself in that strong position, the step he has taken [in expressing his wish to join Real] could be key," Calderon said. "As we have already said many times, it is a problem between Manchester United and the player. If the two resolve the situation and Manchester United want to call us, then we will be happy and delighted with that because Cristiano is a great player. We can't say anything more. We only talk about our own players - and Cristiano is Manchester United's."