Before our first leg semi-final UEFA Europa League match, Arsenal beat West Ham United 4-1 in the Emirates Stadium. Nacho Monreal, Aaron Ramsey and Alexandre Lacazette (2) scored Arsenal's goals.

Monreal scored the first goal of the match in the 51st minute and nearly 15 minutes later, Marko Arnautovic scored the equalizer. in the final 10 minutes of the match, Arsenal scored three goals to end up winning 4-1.