AC Milan sporting director Massimiliano Mirabelli has told Real Madrid president Florentino Perez he is ready to discuss a player exchange deal involving Gianluigi Donnarumma and Cristiano Ronaldo.

The 18-year-old Donnarumma informed Milan this week he is not interested in signing a contract renewal and Madrid are believed to be keeping a close eye on the highly rated goalkeeper's situation at San Siro.

Ronaldo, meanwhile, is reportedly keen to leave Madrid amid scrutiny in Spain over his tax affairs.

"If Ronaldo wants to leave Madrid because of his tax problems and Real want to sign Donnarumma, then we are ready to talk to Perez," Mirabelli told Corriere dello Sport.

"Although obviously without the transfer fee of €400 million that the Spanish press has mentioned..."