The 19-year-old came on in the second half of Saturday's 2-0 win over Reading in the third round of the Emirates FA Cup at Old Trafford, replacing Juan Mata in the 62nd minute.
The forward showed glimpses of his talent in an energetic display and admitted in his post-match interview with MUTV that it was a proud moment for him and his family.
“It was a special moment and I couldn’t enjoy it more than I did,” he told Stewart Gardner in the tunnel after the game. “The boss [Ole Gunnar Solskjaer] said just enjoy it, get on the ball and try and get a few touches in and just enjoy the game.