Roy Keane has called on Jack Grealish to "grow up" as he slammed the Man City star before their FA Cup win over Peterborough on Tuesday night.
The former Ireland and Aston Villa ace, who is now the most expensive British player in history, headed to the Etihad in the summer for an eye-watering fee, Mirror UK reports.
Grealish has shown quality in glimpses but has been unable to nail down a regular spot in a team full of stars as boss Pep Guardiola's high demands on players mean competition is fierce..
