Stadium: Court 3 Round: 62 Ground: Hardcourt outdoor
| ITF - M15 Zahra | 2023/12/13 06:55 | Guy Den Heijer v Alastair Gray | 4-6,4-6 |
| ITF - M15 Zahra | 2023/12/04 06:55 | Guy Den Heijer v Raffael Schaer | 3-6,4-6 |
| ITF - M15 Al Zahra | 2023/11/29 10:20 | Ali Habib v Guy Den Heijer | 6-4,6-3 |
| ITF - M25 Heraklion | 2023/11/11 08:30 | Guy Den Heijer v Cezar Cretu | 4-6,4-6 |
| ITF - M25 Heraklion | 2023/11/10 09:55 | Harry Wendelken v Guy Den Heijer | 5-7,2-6 |
| ITF - M25 Heraklion | 2023/11/08 07:00 | Guy Den Heijer v Mattia Ricci | 6-2,6-1 |
| ITF - M25 Heraklion | 2023/11/07 07:30 | Guy Den Heijer v Simon Freund | 6-2,3-6,10-5 |
| ITF - M25 Heraklion | 2023/11/06 07:00 | Guy Den Heijer v Evangelos Kypriotis | 6-1,7-5 |
| ITF - M15 Sharm-el-Sheikh | 2024/02/04 12:00 | Niklas Grunewald v Ilgiz Kamchibekov | 6-2,7-5 |
| ITF - M15 Sharm-el-Sheikh | 2024/01/28 12:30 | Niklas Grunewald v Filiberto Fumagalli | 5-7,4-6 |
| ITF M25 - Nußloch | 2024/01/21 08:30 | Niklas Grunewald v Gabriel Moroder | 5-7,4-6 |
| ITF - M15 Sharm-el-Sheikh | 2023/12/05 08:00 | Lorenzo Lorusso v Niklas Grunewald | 6-3,6-2 |
| ITF - M15 Sharm-el-Sheikh | 2023/12/04 10:30 | Niklas Grunewald v Cedric Stanke | 6-3,1-6,10-8 |
| ITF - M15 Sharm-el-Sheikh | 2023/11/20 10:30 | Niklas Grunewald v Daniil Savelev | 1-6,1-6 |
| ITF M15 - Santo Domingo | 2023/11/12 13:00 | Niklas Grunewald v Emmett Ward | 1-6,1-6 |
| ITF - M25 Santo Domingo | 2023/11/06 16:00 | Imran Sibille v Niklas Grunewald | 6-4,7-6 |