Hello
Arsenal won 4-1 in shootout after the match ended 1-1 in regulation time.
English champions City started their big close-season signing, Norway's Erling Haaland but, in contrast to Nunez, he had a disappointing debut, missing several chances and struggling to combine with his new team mates.
Gunners captain and match goal-scorer Pierre-Emerick Aubameyang blasted home the final kick of the afternoon to complete the north London side's second win over the league champions in the space of six weeks after a shortened summer break.
Pep Guardiola's side converted all five of their penalties in ruthless fashion while Georginio Wijnaldum had his effort saved by Claudio Bravo.
The Sky Blues beat Chelsea 2-0 to become the first Premier League champions to win the trophy since Manchester United in 2013.