MANCHESTER: Manchester City opened up a 12-point gap on Manchester United just 12 games into the Premier League season and returned to the top of the table with a convincing 3-1 win in Sunday’s (Nov 11) derby at the Etihad.Early goals in each half from David Silva and Sergio Aguero put City in command and Ilkay Gundogan condemned United to a fourth league defeat of the season after Anthony Martial’s penalty had given the visitors hope.City leapfrog Liverpool to move back two points clear at the top of the table, while United remain in eighth.The English champions have now won 11 and drawn one of their last 12 games with the only blip in that run coming in a creditable 0-0 draw away to Liverpool – one of only two fixtures they lost in the Premier League last season.The other was at home to United when City spurned the chance to seal the title against their local rivals by blowing a 2-0 half-time lead to lose 3-2.City settled that score and ensured that if they are to be denied in their quest to be the first side in a decade to retain the Premier League, the challenge is likely to come from…