The 21-year old Italian striker has been seeking a loan move away from Old Trafford in recent times with his representative Giovanni Bia suggesting a temporary shift to Stuttgart with the view to a permanent deal is a likely option.
"We are at an advanced point with Stuttgart," Bia told TMW. "Negotiations are going well.
"He is a player who is liked by a lot of clubs. Two Spanish ones, for example, are looking to intervene.
"He'll join a club on loan with the option to be signed outright as his contract expires in June 2014."