Since the arrival of Gael Clichy from Arsenal, the Serbian has struggled to secure a regular first-team place. Kolarov started only nine Premier league games last season and is keen to move back to Italy.
Kolarov enjoyed three successful years at Lazio in the Serie A and Juventus boss Antonio Conte believes he can play a big role next year for the Italian champions.
Juventus are keen to secure Kolarov on a season long loan, but it's believed City are looking for a permanent deal so they can recoup some of the £18m they splashed out back in 2010.
Juventus will be hurried into a decision as he is also attracting interest from Inter Milan who could make a move for the Serbian in the next few weeks.