Real Madrid president Florentino Perez says he wants to sign Manchester United star Cristiano Ronaldo.

"Kaka, Cristiano Ronaldo and Lionel Messi are the best players in the world," Perez told Atena 3. "I'm going to work to bring Kaka and Cristiano Ronaldo to Real Madrid.

"I've been here a few days and neither (former president, Vicente) Boluda nor anyone else has talked to me about this supposed agreement.

"What would be very good is to see these great players at Real Madrid this season. Cristiano would be one of these."