Pablo Fornals has his second and West Ham a third.
It is partly made, though, by Oliver Scarles, who's cross forces the home keeper to flap and push the ball to the Hammers forward. He makes no mistake with his finish.
That is game, set and match.
Big chance for the home side to put this back in the balance!
Ianis Stoica sets up Eduard Radaslavescu in space in the middle but he drags his shot wide of the post.
Two Arsenal subs that say 'right, let's put this to bed'.