According to reports, the Blues are among several clubs tracking the talented teenager, alongside Manchester City. The €28m valuation for the creative midfielder represents potential value for money, as comparable players of his age and quality could command closer to €40m on the market.
Karetsas has emerged as a top target for Chelsea this summer, with the club expected to focus on young talents between 18-23 years old. His impressive assist numbers have made him a hot commodity in the transfer market.