The defeat was the Hammers' first of the season in the Premier League at home, while Arsene Wenger's side remain seven points behind Chelsea, who sit at the top of the table.
Instrumental in Arsenal's win were the Spanish midfield duo of Mikel Arteta and Cazorla, who were able to topple the industrious trio of Kevin Nolan, Mark Noble and Diame.
Now for some more Spanish midfield mastery in Sunday evening's El Clasico...
|OLE! Arsenal's matadors make a mockery of West Ham|