The American goalkeeper has helped the Blues to Carabao Cup glory after securing a switch from Columbus Crew in 2019
Zack Steffen "thought my agent was joking" when Manchester City first made their interest known in doing a deal, with the USMNT goalkeeper admitting to still finding life at the Etihad Stadium "very surreal".
The 26-year-old shot-stopper was lured away from his homeland in the summer of 2019, with the Premier League heavyweights putting a deal in place with MLS side Columbus Crew.
Steffen knew that he would be filling back-up duties behind Ederson in England, and was initially sent out on loan to Fortuna Dusseldorf in the Bundesliga, but he jumped at the chance to link up with one of the most ambitious sides in world football.