The £72m record signing has struggled badly in English football and yet now, finally, we are seeing some of the glimpses of his quality.
Arteta said: "Well if you ask me personally what I think of the performance that he put in overall, in all the phases of the game, I think it is the best he has played.
“I don't know how much he wants but he needs guidance. And he needs clarity in what he needs to do.
"And then he needs the discipline on the pitch to do what he needs to do. And obviously he needs the freedom in certain moments to express himself as a player."