Hertha BSC is one of the clubs interested in Ryan Fosso. Thomas Dal, a journalist for 'De Limburger', stated that while there is interest, he has heard that it is still early and that Fortuna Sittard and the other party are still quite far apart. Ryan Fosso himself indicated that he was unable to play against Go Ahead due to transfer issues.

According to a report from Gianluca Di Marzio, Hertha is one of several clubs interested in Fortuna Sittard's 23-year-old Swiss and Cameroonian midfielder, Ryan Fosso. The report also identifies Empoli, Kaiserslautern, Borussia Mönchengladbach, and Lech Poznań as holding an interest in the player. Fosso's contract is valid until the end of the current season, but Fortuna Sittard has an option to extend it for another 12 months. A former Switzerland U21 international with 3 caps, Fosso joined his current club on July 1, 2024. According to Transfermarkt, his current market value is €2.00m.