Stadium: Center Round: 29 Ground: Clay
| ITF M25 - Risskov/Århus | 2023/06/16 09:55 | Max Houkes v Guy Den Ouden | 6-3,3-6,4-6 |
| ITF M25 - Haag | 2023/07/08 13:00 | Guy Den Ouden v Eric Vanshelboim | 1-6,6-0,6-2 |
| ITF M25 - Haag | 2023/07/07 16:30 | Guy Den Ouden v Ryan Nijboer | 6-1,6-2 |
| ITF M25 - Haag | 2023/07/06 16:45 | Collin Altamirano v Guy Den Ouden | 6-7,6-3,2-6 |
| ITF M25 - Haag | 2023/07/04 17:00 | Alec Deckers v Guy Den Ouden | 6-7,6-7 |
| ITF M15 - Alkmaar | 2023/06/29 12:05 | Jeffrey Von Der Schulenburg v Guy Den Ouden | 6-4,3-6,7-5 |
| ITF M15 - Alkmaar | 2023/06/28 11:30 | Deney Wassermann v Guy Den Ouden | 6-7,5-7 |
| ITF M25 - Risskov/Århus | 2023/06/17 09:00 | Guy Den Ouden v Leo Borg | 6-3,4-6,1-6 |
| ITF M25 - Risskov/Århus | 2023/06/16 09:55 | Max Houkes v Guy Den Ouden | 6-3,3-6,4-6 |
| ITF M25 - Haag | 2023/07/07 10:00 | Zura Tkemaladze v Max Houkes | 6-3,0-6,1-6 |
| ITF M25 - Haag | 2023/07/06 14:40 | Stijn Slump v Max Houkes | 1-6,5-7 |
| ITF M25 - Haag | 2023/07/05 17:15 | Younes Lalami Laaroussi v Max Houkes | 1-6,3-6 |
| Challenger Modena | 2023/06/26 17:35 | Federico Coria v Max Houkes | 6-4,6-2 |
| Challenger Poznan | 2023/06/20 08:30 | Max Houkes v Tomas Barrios Vera | 1-6,6-7 |
| ITF M25 - Risskov/Århus | 2023/06/16 09:55 | Max Houkes v Guy Den Ouden | 6-3,3-6,4-6 |
| ITF M25 - Risskov/Århus | 2023/06/15 11:55 | Max Houkes v Jonas P Hartenstein | 6-7,6-4,6-3 |
| ITF M25 - Risskov/Århus | 2023/06/14 08:30 | Max Houkes v Jack Karlsson Winstrand | 7-5,6-2 |