The 26-year-old has two years left on his current contract with United.
Talks over a new deal at Old Trafford have broken down over the Portuguese midfielder’s excessive wage demands, according to the Mirror.
The Red Devils tried to offload Nani to Russian side Zenit St Petersburg in the summer transfer window.
Nani is disappointed by the way he has been treated at United, but the club have now hit back and told the winger to shut up and concentrate on playing football.