The Gunners boss has made a controversial decision before the match even started, deciding to leave out Alexis Sanchez from his starting XI.
Not surprisingly, Arsenal fans were not happy over the decision, and took to social media to voice their displeasure...
Iwobi over Alexis? What on earth is this man smoking?! — Marissa Thomas (@marissatom16) September 17, 2017
Alexis on the bench for Banter FC — ArsenesChilean (@ArsenesChilean) September 17, 2017
You call that strong line up without AlexisMuh_ bello (@muh_bello) September 17, 2017