Cannavaro also commented on Real teammate Antonio Cassano, who has had an impressive spell on-loan at Sampdoria this season.
He added: "His skills never have been in doubt. If anything, it's his character. I understand that, at Sampdoria, he has had an impressive championship. I'm pleased for him. As a captain, and his deep admirer, I can only wish he can manage his nerves better. Be more rational. The talent, I repeat, is indisputable."