City did end up winning the game against the Black Cats 2-1 with Gundogan looking on as a spectator.
Gundogan shared his match-day experience on Instagram alongside the following caption: “Supporting from the stands! Good match for us so far … #cityvsafc #etihadstadium #premierleague @mancity @premierleague.”
City boss Pep Guardiola won his first game in charge of the Citizens thanks to a late own goal from Paddy McNair.
Gundogan joined City on a big money move from Borussia Dortmund over the summer but has yet to even play a friendly for his new club due to injury.
The Germany international of Turkish origin is not expected to return until the end of the month.