Falcao has agreed personal terms with Real and Monaco are now prepared to discuss terms with the European champions over a fee.
Carvalho told AS: "Everyone knows Cristiano Ronaldo is the best player in the world and also the best professional.
"In terms of professionalism, Falcao is the player who is closest. He will have a very long career because he takes so much care.
"I think Falcao is the missing piece to make the Madrid attack perfect. Cristiano is the best player in the world, Bale is very good and Falcao is the best striker there is. I’m a defender and I wouldn’t want to face them!"
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