Stadium: Court 14 Round: 27 Ground: Hardcourt outdoor
| ITF - Heraklion M15 | 2023/10/25 06:30 | Guy Den Ouden v Ioannis Kountourakis | 7-5,6-4 |
| ITF - Heraklion M15 | 2023/10/20 07:00 | Guy Den Ouden v Jakub Nicod | 2-6,6-7 |
| ITF - Heraklion M15 | 2023/10/19 08:45 | Dax Donders v Guy Den Ouden | 6-7,5-7 |
| ITF - Heraklion M15 | 2023/10/18 07:25 | Guy Den Ouden v Matthew William Donald | 6-4,6-2 |
| ITF - Heraklion M15 | 2023/10/17 06:30 | Guy Den Ouden v David Quayle | 6-1,7-5 |
| ITF - Heraklion M15 | 2023/10/16 07:00 | Guy Den Ouden v Hamid Reza Nadaf | 6-3,6-4 |
| ITF - Koksijde M25 | 2023/08/20 13:00 | Guy Den Ouden v Timo Legout | 7-5,6-2 |
| ITF - Koksijde M25 | 2023/08/19 12:00 | Luciano Emanuel Ambrogi v Guy Den Ouden | 3-6,4-6 |
| ITF - Heraklion M15 | 2023/10/25 08:10 | Adam Heinonen v Graham Maassen | 6-4,6-3 |
| ITF - Heraklion M15 | 2023/10/24 06:30 | Niels Visker v Adam Heinonen | 6-4,3-6,6-10 |
| ITF - Heraklion M15 | 2023/10/23 10:30 | Piotr Siekanowicz v Adam Heinonen | 2-6,4-6 |
| ITF - Heraklion M15 | 2023/10/17 06:30 | Adam Heinonen v Ki Lung NG | 5-7,4-6 |
| ITF - Falun M25 | 2023/09/26 12:00 | Adam Heinonen v Evgeny Karlovskiy | 6-7,1-6 |
| ITF - Falun M25 | 2023/09/25 08:00 | Adam Heinonen v Jack Karlsson Winstrand | 6-1,6-3 |
| ITF - Falun M25 | 2023/09/24 07:55 | Adam Heinonen v Linus Videhult | 6-3,6-3 |
| ITF - Danderyd M15 | 2023/09/19 12:00 | Adam Heinonen v Jakob Schnaitter | 2-6,2-6 |