Joel Campbell (L) of Arsenal celebrates scoring his team's third goal with his team mate Santi Cazorla (R) during the Barclays Premier League match between Swansea City and Arsenal at Liberty Stadium on October 31, 2015 © Getty Images

The visitors started the game positively, as Nacho Monreal fired wide from inside the penalty area, before Campbell fired over the bar from distance.

Swansea striker Bafetimbi Gomis missed two opportunities to give the hosts the lead, as Hector Bellerin raced back to win the ball off the French international from a one-on-one opportunity with Petr Cech, before the Arsenal keeper kept out a header from the former Lyon man.

Petr Cech of Arsenal brings down Bafetimbi Gomis of Swansea City during the Barclays Premier League match between Swansea City and Arsenal at Liberty Stadium on October 31, 2015 © Getty Images

Arsenal twice came close to taking the lead before half time, as Olivier Giroud curled an effort over the bar, before Swansea keeper Lukasz Fabianski denied Campbell.

After the break the visitors took control of proceedings, and scored the opener on 49 minutes as Giroud rose highest at a Mesut Ozil corner to head past Fabianski.

Olivier Giroud of Arsenal scores the opening goal during the Barclays Premier League match between Swansea City and Arsenal at Liberty Stadium on October 31, 2015 © Getty Images

Swansea almost pegged their opponents back immediately, as Gylfi Sigurdsson forced a save from Cech, before the Czech stopper tipped away a Ki Sung-yeung flick-on from a corner.

Arsenal doubled their lead on 68 minutes, as former Gunners keeper Fabianski dropped the ball under pressure from Giroud, before Laurent Koscielny reacted quickest to tap into an empty goal.

Laurent Koscielny (L) of Arsenal celebrates scoring his team's second goal with his team mates Mesut Ozil (C) and Per Mertesacker (R) during the Barclays Premier League match between Swansea City and Arsenal at Liberty Stadium on October 31, 2015 © Getty Images