Arsenal took home all three points in the first match since the news of Arsene Wenger's departure at the end of the season broke.
Nacho Monreal gave the Gunners the lead with a well-timed volley, only for Marko Arnautovic to cancel out the strike. However, goals from Aaron Ramsey and two from Alexandre Lacazette late-on made sure of the three points for the Gunners.
Arsenal remain in sixth, while West Ham find themselves in 15th, six points clear of the bottom three.
Here, Sportsmail brings you a round-up of all the things you may have missed from the Emirates.