Moritz Heyer has joined Fortuna Düsseldorf from Hamburger SV, with no transfer fee involved as Heyer terminated his HSV contract, which was initially supposed to last until 2026. Heyer had previously been coached by Daniel Thioune at both Hamburg and VfL Osnabrück. Christian Weber, the sporting director of Fortuna, noted that Heyer is a versatile defensive player who is well-acquainted with the challenges of the second league. He emphasized that, given the club's objective to reduce squad size, securing a player capable of covering all defensive positions was crucial.