Aston Villa captain Jack Grealish's contract carries a buyout clause.
Pep Guardiola's Manchester City are ready to launch a bid for the England midfielder, who is currently out injured.
Football Insider says City have been told that Grealish now have a release clause after signing a new contract at Villa Park last September.
Manchester United have also been keen on the 25-year-old in the past but it is unclear if they will be able to match their rivals when it comes to finances.
Sheikh Mansour-owned City are primed for a huge summer in the transfer market, despite Guardiola playing down a move for Erling Haaland.
And Grealish has 'told friends' he would like a move to the Etihad Stadium.
