Stadium: Court 4 Round: 62 Ground: Hardcourt outdoor
| ITF M25 - Oldenzaal | 2023/08/30 15:20 | Luca Matteo Sobbe v Ruben Hartig | 4-6,6-1,7-6 |
| ITF M25 - Oldenzaal | 2023/08/29 09:35 | Roland Stuurman v Ruben Hartig | 6-1,6-3 |
| ITF M15 - Huy | 2023/08/23 16:30 | Ruben Hartig v Simon Beaupain | 3-6,7-5,3-6 |
| ITF M15 - Huy | 2023/08/21 15:20 | Daniel De Jonge v Ruben Hartig | 6-3,5-7,5-10 |
| ITF M15 - Huy | 2023/08/21 10:15 | Jamie Krattiger v Ruben Hartig | 3-6,0-6 |
| ITF M15 - Eupen | 2023/08/08 08:00 | Ruben Hartig v Felix Mischker | 6-4,6-7,7-10 |
| ITF M15 - Eupen | 2023/08/07 07:00 | Ruben Hartig v Eliott Costa | 6-0,7-6 |
| 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 11:30 | Robin Bulant v Morris Kipcak | 2-6,6-3,10-7 |