We've become more accustomed to seeing our team line up with three at the back this season - but for the last two matches, Arsene Wenger has started with a back four.
So with a second clean sheet in four days and four points chalked up since the switch in system, will we be sticking with four at the back from now on?
"It’s possible, yes," Wenger told Arsenal Player. "Especially, I think we were mobile at the back, built the game up well and it gives us one more player to go forward.
"When you don’t score as much as you want, sometimes you look at every single thing and that is why I went for it.
"It was a bit nervy at the end, because we had not taken our chances. We couldn’t finish the game off. But what is most important today is the three points.
"I knew before the game that this is a tricky one because we play three games in six days and that we have not rotated a lot. So I thought it could be a tricky one, but as well the three points tonight are a relief for the team and overall we deserved it."
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