Fewtch
Özil at 10 And Emery Out
He played as a DM in the beginning then moved to CM as the most advanced midfielder of the two CMs in a 442 diamond and then he genuinely played as a 10 in a 4231 at the endThis advanced role you guys make a lot out of, was only towards the end of Emery reign though, when the Özil situation fully came to a head.
From his debut until this season he had always been a CM/DM (when he did play)