Stadium: Court 4 Round: 62 Ground: Clay
| ITF M25 Koksijde | 2023/08/13 12:15 | Daniel De Jonge v Mats Bredschneijder | 4-6,6-1,5-10 |
| ITF M15 Eindhoven | 2023/08/01 11:35 | Daniel De Jonge v Maxime Mora | 6-1,5-7,1-6 |
| ITF M15 Eindhoven | 2023/07/31 08:00 | Guy Den Heijer v Daniel De Jonge | 6-7,7-5,11-13 |
| ITF M15 Eindhoven | 2023/07/30 09:30 | Luca Matteo Sobbe v Daniel De Jonge | 4-6,3-6 |
| ITF M15 Irvine | 2023/06/30 21:00 | Daniel De Jonge v Edward Winter | 3-6,2-6 |
| ITF M15 Irvine | 2023/06/29 20:35 | Omni Kumar v Daniel De Jonge | 4-6,3-6 |
| ITF M15 Irvine | 2023/06/28 21:20 | Daniel De Jonge v Noah Zamora | 6-3,6-4 |
| ITF M15 Irvine | 2023/06/27 17:00 | Ishaan Ravichander v Daniel De Jonge | 6-7,2-6 |
| 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 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 |