By Josh James at London Stadium
Summary
Alexis Sanchez scored a memorable hat-trick as the Gunners brushed aside West Ham with a late flurry of goals at the London Stadium.
Alexis had earlier got the ball rolling when he teed up Mesut Ozil for a close range tap-in during the first half, but it was after the interval that Alexis truly took centre stage.
First he drilled home from a narrow angle after beating two defenders, then he found the net from the edge of the area to make it 3-0 with 10 minutes remaining.