Arsenal manager Mikel Arteta risked getting himself in a spot of bother after appearing to mock the referee in the draw with Atalanta. In the opening fixture of the new Champions League season under the revised format, Arsenal played out a 0-0 with the Europa League winners.

But for Raya saving Mateo Retegui’s 51st-minute penalty and then somehow springing across his goal to claw out the same player’s headed rebound effort, Arsenal could have begun their group games with