Pogba, Matic, Lingard, Martial, Herrera, and Sanchez were all unavailable and yet United pulled out the victory.
This is starting to feel like Chelsea's 2011-12 Champions League winning season. That season saw Chelsea fire their head coach and bring in a caretaker manager that once played for the club in Roberto Di Matteo. That season saw Chelsea overturn a 3-1 aggregate deficit by defeating Napoli 4-1 in the second leg of the Round of 16. The season Manchester United are having is very similar to that Chelsea season.
Fire your head coach, check.
Bring in a caretaker manager, check.
Caretaker manager played over 100 games for the club, check.
Stunning Round of 16 turnaround, check.
And for good measure, both teams had Romelu Lukaku on the roster, check.