Manchester United left north London with all three points in the bag on Saturday, despite playing out a frenetic contest at the Emirates with 10 men.
The Red Devils made a blistering start to the tie, getting themselves in front within 10 minutes courtesy of Antonio Valencia, before Jesse Lingard continued his personal goalscoring run and doubled the lead sooner after.
The England international added his second following a comeback strike from Alexandre Lacazette, before Paul Pogba saw red for an ugly challenge on Hector Bellerin.
While all eyes were trained on every kick of the football, Sportsmail kept a broader look about the Emirates to pick out some of the things you may have missed.