In his four full seasons at City, he's won eight major trophies and broken a series of records along the way.
We looked back over our archive of CityTV videos and picked out all the praise our players have heaped on the manager in recent years.
And here they all are...
"He's one of the best coaches of all time. It was an achievement for me to play for him, to train under him, being able to learn is amazing."
"It was 110% the right decision to come and play under him."
"One thing I've noticed is that, like me, he's mad about football - he lives football."
"When you have the opportunity to be trained by Guardiola, you don't say no."
"He demands a lot from the players and is able to make you the best player you can be."
"Having Pep as a manger in your team changes a lot of things. He's a very prestigious manager and I will have to take advantage of this to learn and improve."
"He's won a lot of titles... when you see his teams, you can tell it's Guardiola. He has an imprint on the team."
"He's one of the best or - I'd say - the best manager in the world.... he can get the best out of me."
"This is a top club and a top club needs a top coach as well."
"The manager speaks volumes for himself... what he has achieved in his career. I still want to learn more."
"Every football player would like to work with Pep, to learn lots of things."
"He's brilliant. One of the best coaches in the world."