The 25-year-old agreed a six-year deal on Thursday, keeping him at the Etihad Stadium until the summer of 2027.
Grealish also donned the No. 10 at former club Aston Villa.
He inherits the shirt from Sergio Aguero, who wore 10 with distinction between 2015-21.
Aguero is the club’s greatest ever goalscorer having scored 260 goals in 390 games during his 10 years at the Club.
Other notable City No. 10s include Edin Dzeko, Shaun Goater and Asa Hartford.
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