Thomas Tuchel’s aspect regularly gained the ascendancy – with Marco Verratti and Marquinhos dominant in midfield – and Mbappe ought to have hit the goal when he was slipped via by Julian Draxler within the 28th minute however fired huge.
United needed to play the second half with out forwards Jesse Lingard and Anthony Martial, who picked up accidents, and their night time acquired worse within the 53rd when Kimpembe ghosted in unattended on the again publish to volley dwelling a nook from Angel Di Maria.
Former United winger Di Maria, booed from the outset by sections of the group, had the final snigger when he collected a nice cross from Marquinhos and arrange Mbappe for the second aim.
The Argentine broke down the left and delivered a low cross which was expertly turned in, first time, by 20-year-old France World Cup winner Mbappe who confirmed lightning pace to get forward of the United defence.
A disappointing night time for United turned worse when midfielder Pogba despatched off for a second reserving after a foul on Dani Alves.
In Rome, 19-year-old Nicolo Zaniolo struck within the 70th and 76th minutes in Roma’s 2-1 victory over guests Porto.
Zaniolo develop into the youngest Italian to attain two objectives in a Champions League match.
Substitute Adrian Lopez secured Porto an away aim within the 79th minute.