Nani still has two years left on his current contract with United, but was hoping to be handed a new deal that would bring him more in line with the club’s top earners.
But United remain reluctant to hand the highly-rated winger a new contract, according to The Mirror.
Reports claim United could be prepared to cash in on the 25-year-old this summer.
Nani has been strongly linked with a move to Italian giants Juventus.