Arsenal picked their third consecutive win in the Premier League with a comfortable 4-0 victory over West Brom on Saturday night.
The Gunners were favourites going into the game against Sam Allardyce's team at the Hawthorns, and it proved a successful outing as they bagged maximum points in a chilly night.
Kiran Tierney opened the scoring for the Gunners with a brilliant finish from inside the box in the 23rd minute, before the lively Bukayo Sako scored a second just on the half-hour mark, and Alexandre Lacazette scored a brace in the second half to round off the win.
The Frenchman was one of the two changes made to the starting lineup from the team that beat Brighton last time out, with Mohamed Elneny also missing out.
The match was an evenly balanced affair in the opening few minutes, even though Mikel Arteta's side were the sharper of the two with clear chances in the first10 minutes.
The first real chance fell to Saka in the 10th minute, but his shot was easily saved by the goalkeeper after he managed to beat John O'Shea.
The Gunners missed two more chances before they found a breakthrough, coming from a moment of magic from their number three.
The defender dinked past two players, with Furlong easily beaten down the left channel before cutting into the area and curling home a wonderful ball into the far corner.
The visitors then scored a wonderful team goal in the 28th minute, which started with Bellerin picking out Smith Rowe in midfield, who in turn found Saka. The teenager then slotted in Lacazette at the top of the area, before he picked out Smith Rowe darting in from the right, with Saka applying the finishing touch.
Arsenal then forced a number of saves as the half-time break drew closer, but could not add to their tally.
The second period was a replica of the first, with the hosts starting the stronger of the two before fizzling out.
They had their first attempt on goal in the 47th minute, but their effort, which found the back of the net was ruled out for offside.
It was all done for Allardyce's team on the hour mark as they conceded a third following some awful defending from Ajayi.
His poor initial pass allowed Aubameyang to send Lacazette forward on the break and he managed to pick out Saka down the right, but his cross was sent mercifully onto the post by Ajayi.
The follow-up was smashed into Ajayi's midriff by Smith Rowe before Lacazette curled the ball home past Ivanovic for his fourth successive goal in all competitions.
He then scored his brace four minutes later, turning in a Tierney cross for his fifth goal in four matches.
The win saw Arsenal jump up the 11th place, just six points off the top four spots, albeit they have played a game more.