Greek football sensation Konstantinos “Kos” Karetsas is on the verge of joining Borussia Dortmund after Belgian club Genk reached an agreement with the Bundesliga giants for the teenager’s transfer. The 18-year-old attacking midfielder is expected to sign a five-year contract with Borussia Dortmund, having identified the German club as the ideal destination for his development despite attracting interest from several top European sides. While the final transfer fee has yet to be officially disclosed, the deal is expected to become the largest player sale in Genk’s history.
The Belgian club had reportedly been seeking a fee in the region of €35 million for the highly-rated Greek international. Karetsas has emerged as one of Europe’s brightest young talents after progressing through Genk’s renowned academy system, which has produced several elite players in recent years. He made his senior debut at just 16 years of age during the 2023-24 season before becoming an increasingly influential figure in the club’s first team.
Following 39 appearances during the 2024-25 campaign, in which he scored three goals and provided three assists, Karetsas enjoyed a breakout season in 2025-26 despite Genk’s struggles domestically. The Greek teenager featured in 49 matches across all competitions, scoring three goals and registering an impressive 14 assists, underlining his creativity, vision and maturity beyond his years.Advertising1 (adsbygoogle = window.adsbygoogle || []).push({}); Known for his technical ability, close control and intelligence on the ball, Karetsas has long been regarded as one of Greek football’s most exciting prospects. His performances have attracted widespread attention across Europe, with Borussia Dortmund ultimately winning the race for his signature.
The move also continues Dortmund’s tradition of developing some of world football’s finest young players before they become global stars. The Bundesliga club has previously nurtured talents including Jude Bellingham, Jadon Sancho and Erling Haaland, making it an attractive destination for emerging prospects. For Karetsas, the transfer represents another milestone in what is already shaping up to be a remarkable career.
At just 18 years old, he now has the opportunity to develop on one of European football’s biggest stages while carrying the hopes of Greek football into the future.
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