The 25-year-old Aston Villa star enjoyed a successful season with his club as he scored seven times and registered 12 assists in 27 appearances.
And Grealish's superb form even secured him a place in Gareth Southgate's England squad for the upcoming Euro 2020 tournament.
The England international impressed fans on Wednesday in the Three Lions' 1-0 win over Austria at the Riverside Stadium.
United were heavily linked with a move for Grealish last summer, but Villa played hardball with their star player's future by slapping a £100m asking price to fend off interest from Premier League clubs.
The Red Devils are expected to rekindle their interest in the Villa midfielder this summer, but City could rival them in a bid to land Grealish.
However, The Athletic reports that Grealish has made a decision over where his future will take him next season.
According to the publication, the England midfielder now prefers a move to City in the transfer window ahead of a move to United.
Grealish's current deal with Villa won't expire until 2025 after he inked a new deal with the Premier League club last September.
But the United and City target could be available in the summer if either one of the Manchester clubs decides to trigger his reported buyout clause.
City are reportedly eager to land Grealish ahead of their crosstown rivals and they would be willing to smash the British transfer record to sign him.
Micah Richards believes that Grealish would provide City with "something different," saying he can turn a match on "its head with his dribbling as well as his delivery."
The former City right-back explained: "If they signed him, their fans would soon be thinking, 'Why didn't we get him earlier?'
"Because he would give them something different, even with the top-quality players they already have in those positions.
"Phil Foden, for example, is a very special talent but I don't think even he could do quite what Jack has done at Villa in the past few months.
"With Jack at Villa, he always has to make something happen on his own, and often does.
"He can turn a game on its head with his dribbling as well as his delivery, and he is just top-notch in tight spaces."
Featured Image Credit: PA
Chosen for YouChosen for You
Most Read StoriesMost Read