The Portugal international is currently away from Old Trafford on loan at Sporting Lisbon after a difficult few years as a Red Devils.
Nani said over the weekend that United are keen to secure his return and that he has a future at the Theatre of Dreams, even though his spell in his homeland has been a good one for him so far.
The 28-year-old has already netted seven goals in 24 appearances for his current side, which has helped to boost his reputation once again.
However, there are issues surrounding his £100,000-per-week wages, which may put off suitors.
Another problem is the wide-man’s contract, which still has three-and-a-half-years to run.