The list of teams he played against doesn't exactly inspire. (sbnation.com)
We are not the same team he played against Dortmund. (justarsenal.com)
When the 3 men up top are Ozil, Sanchez and Lacazette, there isn't enough support for the front men and therefore they are ineffective as teams playing against us with ten men behind the ball will easily close them down. (justarsenal.com)