Stadium: Indoor 1 Round: 62 Ground: Clay
| ITF - M15 Meerbusch | 2023/04/24 08:00 | Leopold Zima v Ruben Hartig | 6-4,6-1 |
| ITF - M15 Antalya | 2023/04/17 12:15 | Marlon Vankan v Ruben Hartig | 6-3,6-3 |
| ITF - M15 Antalya | 2023/04/16 07:00 | Ruben Hartig v Pavel Gula | 6-1,6-3 |
| ITF - M15 Antalya | 2023/04/09 06:30 | Ruben Hartig v Atakan Karahan | 1-6,6-3,6-10 |
| ITF - M15 Antalya | 2023/04/03 11:10 | Ruben Hartig v Yuquan Jin | 3-6,2-6 |
| ITF - M15 Antalya | 2023/04/02 07:00 | Elio Jose Ribeiro Lago v Ruben Hartig | 6-2,4-6,3-10 |
| ITF - M15 Monastir | 2023/02/26 08:00 | Ruben Hartig v Hikaru Shiraishi | 0-6,3-6 |
| ITF - M15 Monastir | 2023/02/20 10:25 | Simon Freund v Ruben Hartig | 6-4,6-4 |
| ITF - M15 Monastir | 2023/02/20 08:30 | Alexis Boureau v Olivier Rojas | 6-1,6-3 |
| ITF - M15 Monastir | 2023/02/19 08:30 | Stefan Frljanic v Olivier Rojas | 6-7,6-4,7-10 |
| ITF - M15 Monastir | 2023/02/16 09:00 | Nicolas Tepmahc v Olivier Rojas | 6-1,6-1 |
| ITF - M15 Monastir | 2023/02/15 08:30 | Olivier Rojas v Jose Fco. Vidal Azorin | 6-4,6-3 |
| ITF - M15 Monastir | 2023/02/13 12:30 | Olivier Rojas v Luka Mikrut | 6-7,1-6 |
| ITF - M15 Monastir | 2023/02/12 08:30 | Adrian Oetzbach v Olivier Rojas | 2-6,3-6 |
| ITF - M25 Nussloch | 2023/01/22 08:30 | Matyas Cerny v Olivier Rojas | 6-1,6-3 |
| ITF - M15 Monastir | 2022/12/14 11:55 | Omni Kumar v Olivier Rojas | 6-2,6-0 |