Rasmussen (born in Lyngby, Denmark, on 19 January 2003) joined Ajax in the summer of 2019 from FC Nordsjælland, where he spent most of his youth development. He made his first-team debut for Ajax on 11 January 2023 in the Dutch Cup match against FC Den Bosch. Rasmussen played 25 official matches for Ajax, scoring twice.
Alex Kroes: "Christian has been with Ajax for several years, but unfortunately, he was unable to secure a regular spot in the starting XI. He's a hard worker, and we hope he can take that next step in the 2. Bundesliga to continue building a successful career. We've wished him all the best in his new challenge."