United, meanwhile, are considering a number of offers for unwanted World Cup winner Bastian Schweinsteiger.
The German ace has been frozen out and ordered to train with the youngsters after Mourinho decided he was not part of his plans.
Mourinho has come under fire for his treatment of Schweinsteiger, who only joined United from Bayern Munich 12 months ago in a £12m deal.
But United are determined to press on with their plans to sell him and there has been strong interest in the 32-year-old, despite his £200,000-a-week wages.
It is understood both Milan clubs are keen on Schweinsteiger along with a host of Premier League outfits.