Here's how the Gunners rated during a steely 1-0 win at the Hawthorns on Saturday afternoon.
Damian Martinez - 6.5/10
Martinez went relatively untested despite late West Brom pressure but was good in the air.
Nacho Monreal - 6/10
Came off injured in the first half.
Laurent Koscielny - 6.5/10
Not at his best after only just returning from injury but his comeback made the Arsenal defence look so much better as a unit. Per Mertesacker benefited from being back alongside the Frenchman and so did Arsene Wenger's full-backs.
Per Mertesacker - 6.5/10
The Baggies did not threaten all that much until, suddenly, they piled men forward late on - when Mertesacker and co. did well to keep a clean sheet for the visitors.
Calum Chambers - 7/10
A strong performance from the young right-back, who is clearly enjoying his football. This display was a far cry from when he was run ragged during the 2-1 defeat at Swansea City.
Mathieu Flamini - 6/10
Made no major errors but did give the ball away. The Gunners' midfielder did not need to do too much protecting of his back four today.
Aaron Ramsey - 7/10
The Welshman showed plenty of improvement compared to his surprisingly miserable recent form. Ramsey linked up well with his Arsenal team-mates and, though he lacked sharpness in front of goal, the 23-year-old provided a real presence at the Hawthorns today.
Santi Cazorla - 8/10
A superb display from the Spaniard, who also put some of the ghosts of recent weeks to bed with a strong showing. Cazorla was everywhere and created chances aplenty, passing brilliantly in the final third. Before the break, however, the Arsenal man wasted too many of his shots and lacked an end product. Once he provided a phenomenal assist for Danny Welbeck's winner in the second half, that was no longer an issue.
Danny Welbeck - 8/10
There were so many fears about Welbeck being shunted out wide upon the return of Olivier Giroud but the 24-year-old seemed to thrive alongside the Frenchman. Cutting inside, the England forward created a number of chances, worked extremely well with his team-mates and, most importantly, headed home Cazorla's second-half cross to earn Arsenal all three points.
Alexis Sanchez - 6/10
The Chilean did little wrong but the West Brom defence simply seemed to get the better of him. This looked like Sanchez's day off, perhaps as he was tired from his brilliant exploits in an Arsenal jersey of late.
Olivier Giroud - 7/10
The unsung hero for the Gunners today. Without Giroud, Wenger's men would not have been half as effective. The whole shape of the team looks so much more fluent and natural with someone able to sit in the middle and spearhead their attacks, allowing those around him the freedom to move more.
Kieran Gibbs- 6.5/10
Stood in well for Monreal.
Alex Oxlade-Chamberlain also came on with 12 minutes to go and should really have started, such is his threat right now - especially against a Baggies defence that would have struggled to deal with his pace. But Wenger clearly had one eye on squad rotation today and, seeing as his side left with three points and a clean sheet, the Frenchman cannot be faulted on that front.