Stadium: CC Round: 54 Ground: Clay
| ITF M15 Trier | 2023/08/21 09:30 | Karlo Cubelic v Tim Pauly | 6-1,6-1 |
| Luedenscheid, Germany | 2023/07/30 10:35 | Karlo Cubelic v Marvin Moeller | 3-6,6-3,2-6 |
| ITF M15 Metzingen | 2023/07/24 12:00 | Karlo Cubelic v Galfinger, Rostislav | 2-6,4-6 |
| ITF M15 Metzingen | 2023/07/23 07:30 | Karlo Cubelic v Stefan Peter Hampe | 6-3,2-6,10-5 |
| ITF M15 Uslar | 2023/07/17 08:00 | Karlo Cubelic v Aaron James Williams | 6-7,6-4,6-10 |
| ITF M25 Kassel | 2023/07/12 11:55 | Hady Habib v Karlo Cubelic | 6-0,6-4 |
| ITF M25 Kassel | 2023/07/11 09:30 | Recek, Dominik v Karlo Cubelic | 2-6,1-6 |
| ITF M25 Marburg | 2023/07/05 10:55 | Karlo Cubelic v Louis Wessels | 7-6,4-6,3-6 |
| ITF M15 Trier | 2023/08/21 09:30 | Hoogland, Joris v Steinorth, Torben | 7-6,5-7,7-10 |
| ITF M25 Wetzlar | 2023/07/31 08:00 | Daniel Salazar v Steinorth, Torben | 6-3,6-2 |
| ITF M15 Metzingen | 2023/07/23 07:30 | Alazmeh, Taym v Steinorth, Torben | 6-7,7-6,10-4 |
| ITF M15 Uslar | 2023/07/17 08:00 | Bruna, Esteban v Steinorth, Torben | 6-4,6-3 |
| ITF M15 Uslar | 2023/07/17 08:00 | Steinorth, Torben v Luca Hesselmann | 1-6,6-1,10-8 |
| ITF - M15 Meerbusch | 2023/04/24 08:00 | Steinorth, Torben v John Sperle | 3-6,3-6 |
| ITF - M25 Nussloch | 2023/01/23 09:00 | Steinorth, Torben v Vojtech Petr | 4-6,4-6 |
| German Championship | 2022/12/05 11:00 | Steinorth, Torben v Djonov, Christian | 4-6,6-6 |