Stadium: Court 8 Round: 26 Ground: Clay
| ITF - M25 Haga | 2023/07/05 17:10 | Collin Altamirano v Oskar Jansson | 6-2,6-4 |
| ITF - M25 Haga | 2023/07/03 10:00 | Roland Stuurman v Collin Altamirano | 2-6,6-3,10-8 |
| ITF - M25 Haga | 2023/07/02 08:00 | Twan Van Zijl v Collin Altamirano | 1-6,5-7 |
| ITF - M15 Wroclaw | 2023/06/26 08:00 | Collin Altamirano v Michael Agwi | 3-6,3-6 |
| ITF - M15 Wroclaw | 2023/06/25 09:00 | Kris Krawcewicz v Collin Altamirano | 3-6,0-6 |
| ITF - M15 Saarlouis | 2023/06/22 10:15 | Joao Fonseca v Collin Altamirano | 6-2,6-3 |
| ITF - M15 Saarlouis | 2023/06/21 09:20 | Collin Altamirano v Andres Andrade | 7-6,2-6,6-3 |
| ITF - M15 Saarlouis | 2023/06/19 09:30 | Boris Fassbender v Collin Altamirano | 2-6,7-6,8-10 |
| ITF - M25 Haga | 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/Aarhus | 2023/06/17 09:00 | Guy Den Ouden v Leo Borg | 6-3,4-6,1-6 |
| ITF - M25 Risskov/Aarhus | 2023/06/16 09:55 | Max Houkes 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 | Carl Emil Overbeck v Guy Den Ouden | 1-6,2-6 |
| ITF - M25 Bodrum | 2023/05/25 07:00 | Valentin Vacherot v Guy Den Ouden | 6-3,6-3 |