Perhaps it’s the bias talking from the former Red Devils star, but Wayne Rooney doesn’t believe the Premier League leaders have surpassed one of his ex-squads.

Despite Manchester City’s amazing unbeaten start over the club’s opening 18 matches, Rooney says his former rivals aren’t quite yet better than his 2008 Manchester United team that went on to beat Chelsea in the Champions League final.

“I’m not sure they [City] are quite there. They would have to keep going and do a lot more,” Rooney told TalkSPORT. “There have been so many great teams throughout the years in the Premier League. This City team needs to win trophies and needs to do it for a longer period to be in that bracket.

“The best ever? I would go with the Man United team from 2008!”

Only one Premier league side has ever finished a season undefeated in league play, which was accomplished by “The Invincibles” of Arsenal from the 2003/04 campaign.