Stadium: Center Bohdan Tomaszewski Round: 14 Ground: Clay
| ITF M15 Eupen | 2025/08/08 12:00 | Simon Beaupain v Niels Visker | 6-4,6-3 |
| ITF M15 Eupen | 2025/08/07 11:30 | Benoit Torcq v Niels Visker | 2-6,4-6 |
| ITF M15 Eupen | 2025/08/06 11:41 | Maik Steiner v Niels Visker | 6-4,3-6,4-6 |
| ITF M25 Wetzlar | 2025/07/31 09:00 | Niels Visker v Fabrizio Andaloro | 5-7,3-6 |
| ITF M25 Wetzlar | 2025/07/30 09:00 | Yannic Nittmann v Niels Visker | 4-6,4-6 |
| Challenger Bunschoten | 2025/07/14 10:40 | Niels Visker v Marvin Moeller | 6-7,3-6 |
| Challenger Bunschoten | 2025/07/13 12:50 | Svyatoslav Gulin v Niels Visker | 7-6,6-7,3-6 |
| ITF M25 The Hague | 2025/07/11 12:09 | Niels Visker v Jay Friend | 1-6,4-6 |