| 1. Round | 13/08/2023 | FC-Astoria Walldorf | - | 1. FC Union Berlin | 0:4 | ||||
| 2. Round | 31/10/2023 | VfB Stuttgart | - | 1. FC Union Berlin | 1:0 |
| 1. Round | 13/08/2023 | FC-Astoria Walldorf | - | 1. FC Union Berlin | 0:4 | ||||
| 2. Round | 31/10/2023 | VfB Stuttgart | - | 1. FC Union Berlin | 1:0 |
| Frederik Riis Rønnow | |
| Born: | 04.08.1992 |
| Place of birth: |
Horsens, 
Denmark |
| Nationality: |
Denmark
|
| Height: | 188 cm |
| Weight: | 81 kg |
| Position(s): | Goalkeeper |
| Foot: | right |