Awesome Alexis Sanchez hit a hat-trick as Arsenal demolished West Ham and piled the pressure on Slaven Bilic.

Mesut Ozil hit a tap-in to open the scoring on 24 minutes. Sanchez then struck in the 72nd, 80th and 86th minutes with Alex Oxlade-Chamberlain adding a screamer.

Substitute Andy Carroll bagged a close range consolation but angry West Ham fans deserted the London Stadium long before the finish with the club deep in relegation trouble.

The Chilean was in a league of his own (Photo: Getty)

A magnificent third from Alexis Sanchez (Photo: Reuters)

Sanchez, the preferred choice up front for Arsenal boss Arsene Wenger, has now scored 13 goals this season.

West Ham have still won only three times and Bilic’s side face in-form Liverpool next week.