Union SG's 22-year-old Belgian defender Fedde Leysen is linked with a move to Napoli, with West Ham United and Fiorentina also mentioned as interested clubs. VfB Stuttgart, Eintracht Frankfurt, and Bayer Leverkusen are also interested, and Stuttgart is said to be showing strong interest. A potential transfer fee of €15-20 million was mentioned, though this is considered unlikely for a player who is currently a substitute and has an estimated market value of €5 million. It is suggested that these rumors should be treated with caution. Leysen joined Union SG in July 2023 and is under contract until June 2029. This season in the Jupiler Pro League, he has made 23 appearances, scoring one goal and providing one assist. The centre-back also has two caps for the Belgium U21 team. In August 2025, Union SG's reported asking price was over €10 million, while a month prior a transfer for around €5 million was considered likely.