Arsenal's disappointing start to the season hit a new low after their fans were seen celebrating Manchester City's fourth goal at the Etihad Stadium on Saturday.
Mikel Arteta's side lost the game 5-0, their third defeat in three Premier League matches this season. They are now bottom of the league, have yet to score and have conceded nine goals.
The Gunners were up against it early on after Granit Xhaka's red card in the 35th minute for a two-footed lunge on Joao Cancelo.
The nature of the emphatic loss will increase the pressure on Arteta after a poor start to the campaign; following on from defeats to Brentford and Chelsea in their first two fixtures.