Two goals in the space of three second-half minutes were enough to see off a spirited Everton side at Emirates Stadium.
Petr Cech kept us in the game during the first half, saving well from Richarlison and the returning Theo Walcott, but the game was flipped on its head just before the hour mark.
Alexandre Lacazette fired a superb opening goal, finding the top corner from 15 yards out, before Pierre-Emmerick Aubameyang made sure of the points shortly afterwards, when Mesut Ozil's cross fell to him via Aaron Ramsey.
Everton started well, with Richarlison forced a good diving save from Cech midway through the first half, while our best chance in the opening exchanges was a charged down Nacho Monreal shot.
The visitors continued to dictate the pace of the game, Cech having to race off his line to deny the advancing Walcott before the defence had to reorganise following an injury to Sokratis. Rob Holding, who impressed on Thursday night, replaced him.
Cech was called upon late in the half yet again, and made a strong save to keep out a rising Richarlison effort.
We were labouring again in the second half, but a moment of genius from Lacazette broke the deadlock. Ramsey found the Frenchman just inside the area, and the striker took a touch before arrowing his shot straight into the top corner. It was an unstoppable strike and settled us - and moments later we doubled our lead.
Lacazette started the move for the second, stealing the ball and sending Ozil free. The German broke into the box, looked to pick out Ramsey, but the ball was slightly behind him, where Aubameyang was lurking to tuck home his third goal of the week.
The quickfire double completely changed the complexion of the game.
Alex Iwobi and Danny Welbeck were introduced to add extra attacking threat, but the priority now was keeping a first clean sheet of the season - and we managed this thanks to a couple more saves from Cech, and at the final whistle the home fans were able to celebrate a fifth successive win.
HOW IT HAPPENED
The third of four home games in the space of 10 days comes on Wednesday night, when we host Brentford in the third round of the Carabao Cup.
We made it all the way to the final last season, but the Bees will provide stiff opposition - they are seventh in the Championship, despite a 3-1 defeat on Saturday.
Then three days later we are back at Emirates again, to face Watford in the Premier League on Saturday.
Copyright 2019 The Arsenal Football Club plc. Permission to use quotations from this article is granted subject to appropriate credit being given to www.arsenal.com as the source.