#2 Mesut Ozil
From Arteta's first two games in charge, it is evident that when Arsenal have possession, the team try to find Mesut Ozil so that he can create something. Although he has not scored or provided any assists, the German's body language and involvement in the game is a stark contrast from the days Unai Emery was the club's manager.
Similar to the last two matches, the Gunners will try their best to dominate possession and allow Ozil to have the ball. It is only when Arsenal have possession, then the midfielder can do his job and create chances for his team.
In the defeat to Chelsea, the north London team were stifled of possession in the second half. Ultimately, that cost them because all the attackers were busy defending and none of them had the opportunity to go upfront.