#2 Sloppy Passing from Napoli
It really was not a match filled with accurate passing throughout the match. Both sides showed their lack of accuracy in passing, but the result for more detrimental for Ancelotti's side. The players lost the ball on too many occasions and allowed Torreira and Ramsey to intercept with ease. This lack of precision in passing affected Napoli's chances to attack and allowed Arsenal to turn around the direction of the game.
The home side was not particularly impressive with their passing either. Maitland-Niles, Lacazette and Mesut Ozil all lost the ball on multiple occasions. However, it was generally still better as compared to Napoli.
The midfield pairing of Ramsey and Torreira was simply overpowering that of Gli Azzurri and the Italian side was unable to cope with Arsenal's style of play. They repeatedly collected the loose balls from Napoli and frustrated their opponents.