The Daily Star says Fergie has been impressed with a change in attitude from Nani in recent weeks.
He said: "His contract's not up for a year-and-a-half. "We need a Nani. He offers something different from the other players. He's an incredible talent.
"Unfortunately, he's injured at the moment so we sent him over to Dubai for a break and are hoping a bit of warmth will help his recovery.
"He's not far away but I don't think I'll get him back until probably the middle of January.
"But he's got it right in the top and it's a bad one.
"Yes. Absolutely (he still has a future at United). Why would I want to let him go?"