Granit Xhaka's performance was one of the big talking points following Sunday's win at Sheffield United.
Our midfielder played the full 90 minutes at left back, deputising for the injured Kieran Tierney, as we kept a clean sheet at Bramall Lane.
So was Xhaka's new role just a one-off - or part of a future plan?
"We looked at our options in relation to the opponent and the formation that we wanted to use to fit the qualities of the players that we had available," Mikel Arteta said.
"Obviously not having Kieran, it was a big hit because of what he produces and how important he is on the team. Now we have to find different ways and the good thing with Granit is that he can play in two or three different positions.
"I can see him still playing as a centre back when it's needed because of his discipline, his commitment and his qualities and he did a good job in a different game, for the way Sheffield were set up. We'll decide tomorrow.
"At the moment we are missing David, Kieran, we are missing Martin as well, we are missing Auba. So we've been missing quite a lot of important players and we have to move the team somehow without touching it too much. But we have to find the right solution."
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