It took stoppage-time goals from Edin Dzeko and Sergio Aguero to swing the result City’s way, meaning that they pipped Manchester United to the league title – their first in 44 years - by way of goal difference.
The French winger invoked the wrath of Gunners fans when joining City last summer for £25 million but insists that Sunday's triumph more than justifies his decision to leave north London.
“I have never seen anything like it in my life,” an ecstatic Nasri told Sky Sports after the game.
“To score two goals like that and give us the title [in] the 94th minute - it's something amazing and I'm really happy.
“I knew that I made the right decision and tonight I want to celebrate with all the fans who are here.
“Tonight I will enjoy it with my family, my friends and all the fans. And tomorrow I will send them a message.”
Such was Nasri’s conviction that he would win trophies with Roberto Mancini's team he had previously made a public bet with vocal Arsenal fan Piers Morgan after the former newspaper editor criticised his transfer on Twitter.
The pair bet £10,000 on which of their clubs would be the first to win silverware following his departure, with the winner donating the fund to charity.
Morgan lost the bet, but the midfielder added: "I will give to charity tomorrow, because some children need this money."