The 2014 champions defeated West Brom 3-0 at the Hawthorns to establish their title credentials.
Raheem Sterling's debut for City lasted 74 minutes before he was replaced, while Irish international James McClean also made his debut for West Brom, but was replaced at half-time as the home side went chasing the game.
City captain Vincent Kompany rounded-off the scoring and said afterwards that the squad has been revitalised over the summer.
