Mason Greenwood scored twice as Manchester United got four in 11 minutes to defeat AZ Alkmaar and secure a seeding for the Europa League knockout phase.
After a mundane first half, the game burst into life in the 53rd minute when Ashley Young drove home Juan Mata's cross for his first goal since February.
Greenwood stole the headlines though, firing home from the edge of the box before producing a fine left-footed finish to end the scoring frenzy.
It was the first time the 18-year-old had scored two in a first-team game and took his overall tally for the season to six. He is now United's leading scorer in Europe this season and only Marcus Rashford has scored more in all competitions.
In between the striker's double, Mata converted a penalty for the Spain midfielder's first goal of the season.
The victory was United's biggest in Europe since 2016 when they beat another Dutch side, Feyenoord, by the same score and means they will avoid Benfica, Ajax and Inter Milan in Monday's last-32 draw.