The early sending off of Manchester Cityâ€™s Dedryck Boyata proved decisive as Arsenal took advantage and eased to a 3-0 win against their title rivals at Eastlands.
Within five minute City had a mountain to climb as Boyata brought down Marouane Chamakh as he threatened to break clear on goal.
City desperately tried to get back into the game but the visitorâ€™s finally extended their lead when Alex Song finished skilfully just after the hour.
The Gunners continued to dominate and sealed an emphatic win with a two minutes remaining when Nasri turned provider for Nicklas Bendtner to slot home.
This result puts Arsene Wengerâ€™s team up to second place in the Premiership on goal difference.
Man City scorers:
Arsenal scorers: Nasri 20, A Song 66, Bendtner 88
Referee: Mark Clattenburg
04 Kompany (yellow card)
38 Boyata (red card)
18 Barry (yellow card) (Balotelli 72)
34 De Jong
42 Yaya Toure (Bridge 46)
32 Tevez (Adebayor 52)
11 A Johnson,
20 Djourou (yellow card)
04 Fabregas (yellow card) (Walcott 85)
15 Denilson (yellow card)
17 A Song (yellow card)
23 Arshavin (Rosicky 70)
29 Chamakh (Bendtner 84)