Alexis Sanchez scored twice as Arsenal moved into the top four courtesy of victory over a resilient Burnley.

The Gunners were frustrated for 70 minutes at the Emirates as they were unable to make their vastly superior possession count against a well-drilled Clarets side.

But the deadlock was finally broken by Sanchez, who rose highest in the box to head in a Callum Chambers cross.

Two minutes later, Chambers went from provider to scorer by latching on to a loose ball in the box to hammer home following a corner.

And in the final minute, Sanchez grabbed his second by collecting Kieran Gibbs' low cross in the box and finishing from close range.

The scoreline could have been even greater were it not for Burnley keeper Tom Heaton, who produced a string of superb saves to deny the Gunners, most notably a point-blank block from the volley of substitute Lukas Podolski late in the second half.

The keeper also produced a fine diving save to deny an angled drive from Theo Walcott, who came off the bench to make his first appearance since January following a serious knee injury.