Those in charge at Borussia Dortmund internally believe 18-year-old Greek-Belgian attacking midfielder Konstantinos Karetsas is capable of building a market value of 100 million euros and, consequently, of generating a large sum for the club in a future transfer. The Greek international has 14 caps and 3 goals for his country, joined the club in August 2026 and has a contract until 2031. Transfermarkt estimates his current market value to be €35.00m.