Pep Guardiola gave the green light for £100m to be spent on the playmaker ahead of the 2021-22 campaign.
That was reward for the England international's inspirational performances at boyhood club Aston Villa, yet he has failed to replicate such displays on a regular basis at City.
Grealish has been provided with 122 appearances in all competitions, contributing 14 goals and 18 assists, while he has two Premier League titles and a Champions League trophy among his collection.
However, while Grealish still has over three years remaining on his contract at the Etihad Stadium, he will turn 29 in September.
City open to Grealish bids?In terms of goals, assists and minutes, Grealish is down on previous campaigns, particularly in the Premier League when he has just three goals and one assist from 911 minutes of football.
Jeremy Doku, his competition on the left flank, has not always been consistent in his first campaign at City, yet the Belgian has three goals and seven assists to his name.
At the age of 21, the former Rennes winger is viewed as a more long-term option than Grealish when looking at the wider perspective.
According to Football Insider, City officials are not against trying to cash in on Grealish once business reopens in June.
Pep Guardiola is also seemingly of the same opinion, even though he has shown preference to selecting Grealish in City's most recent, and important, matches.
The report suggests that City are prepared to part ways with Grealish in order to generate funds to make additions during the next transfer window.
What fee may Man City accept for Grealish?When players are
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