Roy Keane has branded Arsenal 'the biggest challenge to Man City' in this year's Premier League title race.
Mikel Arteta's side are top of the league table after nine games played, with 24 points and eight wins. They are one point ahead of current champions City.
Keane, working as a pundit on Sky for Nottingham Forest v Aston Villa, praised the Gunners for their 'confidence' so far this season as they aim to mount a genuine title challenge.
'They are playing with confidence, they have got some physicality,' Keane said.