WATCH: Alexis Sanchez burns West Ham for hat trick

Alexis Sanchez scored a trio of impressive goals after halftime in Arsenal's 5-1 win over West Ham.

For 15 minutes Saturday at London Stadium, Alexis Sanchez was simply unstoppable.

The Arsenal forward recorded a spectacular second-half hat trick in the Gunners' 5-1 win over West Ham, scoring in the 72nd, 80th and 86th minutes.

Arsenal led 1-0 on Mesut Ozil's first-half strike when Sanchez doubled the advantage, collecting the ball 25 yards from goal before beating his man and firing an angled shot inside the far post.

The Chile international extended the lead to 3-0 eight minutes later, taking a clever first touch at the top of the box and firing past Darren Randolph.

After Andy Carroll and Alex Oxlade-Chamberlain traded goals to make it 4-1, Sanchez capped the scoring with a brilliant chip after getting in behind the West Ham back line.