$ 0 0 Manchester City snuffed out Manchester United's recent revival and closed on Premier League leaders Chelsea as Edin Dzeko scored twice in a 3-0 win at Old Trafford on Tuesday.United had been encouraged by wins over Olympiakos and West Ham United, but Dzeko needed only 43 seconds to put City ahead in the 150th league derby between the teams and the hosts never threatened to respond.Dzeko claimed his second goal early in the second half before Yaya Toure added a late third to leave Manuel Pellegrini's side three points behind leaders Chelsea, with two games in hand, ahead of Saturday's trip to Arsenal. The Bosnia international's brace gave City a third consecutive victory at Old Trafford and prevented United from avenging their 4-1 humiliation at the Etihad Stadium in September. Defeat left David Moyes's United 12 points adrift of the top four and to compound matters, while they slumped to a sixth home defeat of the campaign, next week's Champions League opponents Bayern Munich were beating Hertha Berlin to secure the Bundesliga title in record time.