The retired midfielder - who played for both clubs during his career - gave a running commentary on the game on Twitter as part of Heineken's 'Share The Sofa' evening
The 32-year-old tweeted his thoughts on the game for Heineken throughout the encounter, as part of their '#ShareTheSofa' night, hailing the cohesion and penetration of the reigning Champions League holders at the Etihad Stadium.
Goal compiled a list of our favourite tweets from the Englishman during and after the game, including his selection of the best players he's played with and against and why he doesn't thing Franck Ribery should win the Ballon d'Or.
HARGREAVES ON BAYERN'S DOMINANCE
"Bayern are just passing round like it's a friendly game. City need to make it more difficult for them."
"Bayern's really dominant - don't think City have even had a chance."
"Bayern smell blood now - and City need to press, which will open them up even more."
HARGREAVES ON MAN CITY'S CHAMPIONS LEAGUE TROUBLES
"City just have to hope it doesn't get worse. 4 or 5 goals at home would be painful."
"This isn't good for City's hopes. Being beaten like this will be tough for team and fans alike. Not good for confidence."
"This is how City should have started. They needed to be higher. They needed more spirit. Silva is working his magic."
HARGREAVES ANSWERS SUPPORTERS' QUESTIONS
Hargreaves: "Good Q! Weren't as talented as this team, but we had guys with bigger personalities. Would try to intimidate them!"
"Can't single out one Bayern player - they've all been good tonight. A well-oiled goal scoring machine."