Dad: Diego dreams of playing for Real Madrid
Djair Ribas de Cunha said: "It would be a dream come true for Diego to play for Real Madrid.
"No-one from Real has spoken directly with me, but I know he's on the list of coach (Bernd) Schuster's preferred players.
"If Real wants him, they must talk to Werder. But I'm sure it won't be difficult to reach an agreement."