Stadium: Court 3 Round: 62 Ground: Clay
| ITF M25 Maribor Qual | 2023/09/03 11:00 | Sicheng Li v Carlo Angeli | 4-6,4-6 |
| ITF M25 Maribor | 2023/08/28 14:45 | Sicheng Li v Maks Meh | 2-6,1-6 |
| ITF M25 Yinchuan | 2023/08/13 02:00 | Sicheng Li v Xirui Liu | 4-6,6-4,10-5 |
| ITF M15 Rovinj | 2024/03/11 08:30 | Ruben Hartig v Lorenzo Vatteroni | 1-6,0-6 |
| ITF M15 Porec | 2024/03/03 10:00 | Stepan Baum v Ruben Hartig | 6-1,1-6,12-10 |
| ITF M25 Hammamet | 2024/02/12 08:30 | Daniel Bagnolini v Ruben Hartig | 6-3,6-0 |
| ITF M15 Antalya | 2023/12/17 07:00 | Hien Q H Pham v Ruben Hartig | 6-4,7-6 |
| ITF M15 Antalya | 2023/12/10 07:00 | Pablo Roche Alcaya v Ruben Hartig | 7-6,6-3 |
| German Championship | 2023/12/03 16:00 | Sebastian Gampert v Ruben Hartig | 6-2,6-3 |
| ITF M25 Monastir | 2023/11/12 08:00 | Ruben Hartig v Teymuraz Gabashvili | 2-6,0-6 |
| ITF M25 Monastir | 2023/11/06 09:30 | Toby Martin v Ruben Hartig | 6-1,6-1 |