The out-of-favour defender could be set for a return to Serie A with Antonio Conte's side believed to be in the market for a new full-back
The Serbia full-back has struggled to maintain a regular spot in the Premier League club's starting line-up due to injury problems, since his arrival from Lazio in the summer of 2010.
Manchester City completed the purchase of left-back Gael Clichy in the summer for €8 (£7) million and the former Arsenal man has featured in all but one of Roberto Mancini's side's fixtures this season.
Juve were previously linked with Kolarov before City completed a deal believed to be around €17 (£15)m for the 25-year-old.
Kolarov made 24 Premier League appearances for the Citizens last season, scoring one goal in the process.