Stadium: Center Round: 27 Ground: Clay
| ITF M25 The Hague | 2023/07/06 16:45 | 알타미라노, 콜린 v Guy Den Ouden | 6-7,6-3,2-6 |
| ITF M25 The Hague | 2023/07/04 17:00 | 데케르스, 알렉 v Guy Den Ouden | 6-7,6-7 |
| ITF M15 Alkmaar | 2023/06/29 12:05 | von Der Schulenburg, Jeffrey v Guy Den Ouden | 6-4,3-6,7-5 |
| ITF M15 Alkmaar | 2023/06/28 11:30 | 바서만, 데니 v Guy Den Ouden | 6-7,5-7 |
| ITF M25 Risskov/Aarhus | 2023/06/17 09:00 | Guy Den Ouden v Borg, Leo | 6-3,4-6,1-6 |
| ITF M25 Risskov/Aarhus | 2023/06/16 09:55 | 호우케스, 맥스 v Guy Den Ouden | 6-3,3-6,4-6 |
| ITF M25 Risskov/Aarhus | 2023/06/15 08:30 | Philipp Pavlenko v Guy Den Ouden | 2-6,1-6 |
| ITF M25 Risskov/Aarhus | 2023/06/14 08:25 | Overbeck, Carl Emil v Guy Den Ouden | 1-6,2-6 |
| ITF M25 The Hague | 2023/07/06 14:05 | 브라이닌, 알렉산들 v 니부어, 리얀 | 4-6,6-7 |
| ITF M25 The Hague | 2023/07/05 15:15 | 코르윈, 펠릭스 v 니부어, 리얀 | 3-6,4-6 |
| ITF M15 Alkmaar | 2023/06/30 12:05 | 니부어, 리얀 v Sander Jong | 3-6,4-6 |
| ITF M15 Alkmaar | 2023/06/29 10:30 | 니부어, 리얀 v Teun Rozenberg | 6-4,6-7,6-3 |
| ITF M15 Alkmaar | 2023/06/28 11:40 | 니부어, 리얀 v Nicolas Kobelt | 6-2,6-1 |
| ITF M15 Duffel | 2023/06/17 11:15 | 니부어, 리얀 v 잔, 제레미 | 2-6,1-6 |
| ITF M15 Duffel | 2023/06/16 11:00 | 니부어, 리얀 v 스펠레, 존 | 6-4,4-6,6-3 |
| ITF M15 Duffel | 2023/06/15 10:00 | 니부어, 리얀 v 골라, 안드레아 | 2-6,6-1,6-3 |