Pep Guardiola's side had a 2-0 lead in the first 12 minutes when Ilkay Gundogan and Ferran Torres used the best defense to secure close-range goals.
Arsenal's task was made even more difficult when Granit Xhaka was sent off with a critical card to Joao Cancelo. Since then it has been a matter of how many City will get a goal with Gabriel Jesus, Rodri and Torres again, to ensure the final figure is five. If it weren't for Bernd Leno, who saved five times, it would have been easier.