The 16-year-old has been hugely impressive for the youth setup so far this season.
He has scored six goals in three matches for the Under-18s, which could lead to a move.
Advertisement
Advertisement
Per the Manchester Evening News, the speedy attacker could have his choice of teams.
United will be eager to hold onto Mantato, but may have to convince him that he has a path to the first team.
He can play anywhere in the front line, but most scouts believe he will evolve into a right winger.