Stadium: Court 2 Round: 62 Ground: Clay
| ITF M15 Eindhoven | 2023/07/30 10:30 | Ruben Hartig v Christian Lerby | 6-4,1-6,11-13 |
| ITF M25 Telfs | 2023/07/16 10:30 | Ruben Hartig v Serafin Zund | 4-6,6-3,7-10 |
| ITF M25 Esch/Alzette | 2023/07/10 14:00 | Stijn Slump v Ruben Hartig | 6-2,6-4 |
| ITF M25 Esch/Alzette | 2023/07/10 08:45 | Ruben Hartig v Victor Bini | 3-6,6-2,10-8 |
| ITF M25 Esch/Alzette | 2023/07/09 09:25 | Can Ayral v Ruben Hartig | 5-7,3-6 |
| ITF M25 Marburg | 2023/07/04 09:25 | Philipp Pavlenko v Ruben Hartig | 6-4,3-6,10-3 |
| ITF M25 Marburg | 2023/07/03 08:00 | Ruben Hartig v Tim Heger | 7-5,1-6,10-8 |
| ITF M15 Kamen | 2023/06/28 14:55 | Ruben Hartig v Mats Rosenkranz | 6-7,2-6 |
| ITF M15 Lambermont | 2022/08/21 15:45 | Eliott Costa v Alen Moritz Hodzic | 1-6,0-6 |
| ITF M15 Eupen | 2022/08/07 07:30 | Tom Clavel v Eliott Costa | 6-2,6-0 |