A crowd of 51,602 turned up at the Etihad Stadium on Wednesday to say farewell to the former Manchester City captain, who left the Premier League champions at the end of last season.
"I'm the proudest man in the world," said the Belgian, who also gave game time to his brother Francois and a number of players from Anderlecht, where he is now player-manager.
"It's been a special day.
"It's been a perfect evening even though I didn't play. I couldn't have wished for more."