Real Madrid boss Carlo Ancelotti has defended Cristiano Ronaldo over his below par form.
Ancelotti still rates the Portugal captain, who last month was awarded FIFA's Ballon d'Or trophy for the third time in his career.
"I should write a book, or at least, a long chapter on him," Ancelotti told A Bola. "Cristiano is a player with an efficiency that is unique in today's football.
"He has an extraordinary talent and he enjoys it with such a professionalism and seriousness that is difficult to find in a player of that level.
"In the (Real Madrid) changing room he is the leader.
"He speaks a lot to his team-mates, especially to the young ones.
"He is a very important figure, just like Pepe, Sergio Ramos, Iker Casillas or Marcelo.
"If he continues to feel the passion that he has for what he does, he can continue until who knows when, thanks to his great physique an unique genetics."
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