The visitors had the better of the first 45 minutes at the Etihad Stadium under the floodlights, with Stefan Ortega Moreno being called into action twice to keep the score level.
After the interval, Pep Guardiola‘s side emerged with an attacking intent and took the lead just after the hour mark.
Substitute Julian Alvarez took aim from 25 yards and his strike cannoned off the post to the feet of Jack Grealish.
The winger created some space before playing the ball into the path of Ake, who calmly curled into the far corner beyond the sprawling Matt Turner.
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The Gunners pushed late for an equaliser, but led my Player of the Match Ake, our defence remained rigid, organised and professional to put our name in the hat for the fifth round of the competition!
View the best images from the win via our gallery below.
