Alejandro Garnacho may not have got on the scoresheet but he dazzled in his substitute appearance and registered two assists, for the strikes by Fernandes and McTominay.
The teenager produced a positive performance down the left flank and illuminated the ground with his energy and confidence.
It means he has won the award in three of the last five United matches, after also scooping the prize for his showings against Sheriff Tiraspol and Real Sociedad.