Calderon has likened Ronaldo's current situation to his time with Manchester United when Real originally came calling.
He said, "In the end, the player will decide.
"Manchester did not want to let go Cristiano Ronaldo, he was the emblem of the team, but he did not give in on his desire to join us. After that, all that remained was to agree on the sum.
"Does Neymar want to come (Madrid)? Today it is hard to say."