Manchester United manager Ruben Amorim has admitted that he is struggling to work out how to get the best out of Alejandro Garnacho.
Garnacho has played on both wings and as a No 10 so far this season.
The 20-year-old, who has been linked with a possible move away from Old Trafford during the January transfer window, played 81 minutes on Sunday night as United won 1-0 away at Fulham.
He was subbed off shortly after fellow Argentina international Lisandro Martinez had scored the only goal of the game at Craven Cottage.