Manchester City eased past rivals Manchester United with a 4-1 win at the Etihad this afternoon thanks to a brace from Sergio Aguero and goals from Samir Nasri and Yaya Toure - Wayne Rooney struck a consolation goal for David Moyes' side.
Manchester City took control of the early stages with United under piled back into their own half in the opening 15 minutes.
And, City's pressure paid off - entering the 16th minute of the game, the Citizens attacked down the left hand side with Samir Nasri, who found the run of Kolarov and the City left-back put a great ball into the box only for Sergio Aguero to finish home with a sweet volley.
Moments later, and City came close again, Samir Nasri struck another volley - this time the ball sailed over the cross bar.
Wayne Rooney was involved throughout the opening periods and he continued to batte hard against City captain Vincent Kompany.
And as the half went on United started to gain possession of the ball, without really troubling Joe Hart in the City goal.
On the stroke of half-time, City won a corner - Nasri's ball in found Negredo, who headed down and Yaya Toure stuck a leg out to put the ball past De Gea.
The Citizens went in at the break with a comfortbale 2-0 lead.
Incredibly, City began the second half the way they finished the first.
Negredo outmuscled Vidic and put the ball into the box to find Aguero who tapped in from close range to make it 3-0.
City wern't done there. Navas went powering down the right wing and he hung up a delicious ball to the far post and Nasri struck yet another City volley to make it 4-0 after just 51 minutes.
It took United 55 minutes to really threaten Hart's goal - Rooney struck the ball over the bar from 10 yards.
As the game went on, City understandably settled down, but still threatened on the attack. Dzeko, who came on as a substitute, tested De Gea from long range.
With four minutes remaining Wayne Rooney struck a fantastic consolation goal for David Moyes' side from a free-kick. The English striker hit his 11th Manchester derby goal to become the all-time leading Manchester derby scorer.
However, the day belonged to City and Manuel Pellegrini. Led by the quality of Kompany, Toure and Aguero, City put down a marker against the champions.