Having led the way since August, Arsenal were knocked off the top of the Premier League on Wednesday night after being beaten 3-1 by title rivals Manchester City.
Pep Guardiola's side may only lead the way on goal difference - and Arsenal still have a game in hand - but there will more than a few Gunners fans seriously worried City will storm away now.
This latest setback made it four matches without a win for Mikel Arteta's team - three in the league and another loss to City in the FA Cup - and this stuttering form is becoming more than a blip.