Joel Campbell scored his first goal for Arsenal as the Gunners beat Swansea City 3-0 to make it five wins on the spin.
Arsene Wenger’s side were woeful in the first-half and looked to be missing injured duo Theo Walcott and Alex Oxlade-Chamberlain.
But they burst into life after the break with Olivier Giroud breaking the deadlock with a header from Mesut Ozil’s corner.
Laurent Koscielny capitalised on Lukasz Fabianski fumbling a cross to tap the ball into an empty net to make it 2-0, despite the keeper claiming he was fouled, before Costa Rican Campbell marked his Premier League debut with a composed finish
The result means the north London side remain joint top of the table with Manchester City while Garry Monk’s side slip to 13th place.