Mikel Arteta's Arsenal host Pep Guardiola's Manchester City in what will be the biggest game of the Premier League season so far on Wednesday evening.
Arteta's side have been in dazzling form this season, but have started to slip in their last two games.
The Gunners dropped two points in their last league game - drawing at home to Brentford. Before that, Arteta's side were beaten by Everton thanks to a second half header from James Tarkowski.
As for City, the Premier League holders have had a mixed campaign so far.