"Man Utd" team coach Jose Mourinho wipes his hands.
"Red Devils" defeated other opponents in the battle for the promising Catalan Arnau Puigmal.
The contract with the 16-year-old forward had already been agreed in July and only now all the remaining formalities have been sorted out.
Having already played for his country's U-18 national team, Puigmal shone in the "Espanyol" youth team, where he was noticed by "Man Utd" scouts.
Arnau will join "Man Utd" youth team, complementing Aliou Traore (arrived from PSG) and Di'Shono Bernardo ("Chelsea").