The midfielder, who came on as a substitute, helped the Blues to make history when he curled in a sublime effort off the crossbar on 89 minutes.
The strike meant the Blues would become the first top flight side to score five or more goals in three consecutive games in one season since Blackburn in the 1958/59 campaign!
Leroy Sane opened the scoring for the Blues, before teeing up Raheem Sterling for the first of his double.
Sergio Aguero then moved one step closer to breaking the Blues' all-time goalscoring record before Delph completed the scoring with his worldie.
It was a goal of real quality. Hear what the midfielder had to say about it when he spoke to CityTV.