Kevin De Bruyne and Riyad Mahrez both scored twice as Manchester City restored their lead at the top of the Premier League to six points with a 4-1 derby victory over Manchester United at the Etihad Stadium on Sunday. United had put up a decent fight in the first half, going in 2-1 down at the break, but City's quality showed after the interval with Ralf Rangnick's side looking increasingly demoralised. AS IT HAPPENED: MAN CITY vs MAN UNITEDCity have 69 points from 28 games with Liverpool on 63 from 27 matches. United slip down to fifth place, a point behind Arsenal who beat Watford on Sunday and have three games in hand. Belgian De Bruyne was outstanding, running the game from central midfield and then presenting himself as a threat in the box. United were without Cristiano Ronaldo and Edinson Cavani through injuries and surprisingly Rangnick opted to play Paul Pogba and Bruno Fernandes in forward positions.