De Gea has been strongly linked with a move to Old Trafford to replace the retiring Edwin van der Sar.
De Gea’s agent, Hector Rincon, said: “We did have talks with Manchester United but, first of all, they always look for an agreement with the club.
“Anyway, most of the biggest European teams have shown interest in De Gea. What I can tell you is that his release clause now is €20 million, but I have no idea if the club would sell him for less.”