Stadium: Center Round: 25 Ground: Clay
| ITF M25 Quinta Do Lago | 2022/03/25 10:00 | Alec Deckers v Guy Den Ouden | 7-6,6-1 |
| ATP Hertogenbosch | 2023/06/10 09:00 | David Goffin v Alec Deckers | 6-4,6-1 |
| ITF M15 Warmbad-Villach | 2023/05/22 13:15 | Alec Deckers v Alex Barrena | 3-6,1-6 |
| ITF M25 Nottingham | 2023/05/02 12:00 | Alec Deckers v Patrick Brady | 5-7,3-6 |
| ITF M25 Nottingham | 2023/04/28 13:05 | Lucas Poullain v Alec Deckers | 6-4,6-7,6-3 |
| ITF M25 Nottingham | 2023/04/28 11:30 | Lucas Poullain v Alec Deckers | 6-4,6-7,5-3 |
| ITF M25 Nottingham | 2023/04/27 13:55 | Alec Deckers v Stuart Parker | 6-1,6-4 |
| ITF M25 Nottingham | 2023/04/25 13:40 | Alec Deckers v Hamish Stewart | 4-6,7-6,6-1 |
| ITF M15 Lons-le-Saunier | 2023/04/07 15:00 | Maxence Beauge v Alec Deckers | 6-7,6-7 |
| ITF M25 Bodrum | 2023/05/25 07:00 | Valentin Vacherot v Guy Den Ouden | 6-3,6-3 |
| ITF M25 Bodrum | 2023/05/24 07:00 | Guy Den Ouden v Egor Agafonov | 6-1,7-6 |
| ITF M25 Bodrum | 2023/05/23 11:15 | Federico Campana v Guy Den Ouden | 3-6,3-6 |
| ITF M25 Kursumlijska Banja | 2023/05/17 09:00 | Rrezart Cungu v Guy Den Ouden | 6-2,7-6 |
| ITF M15 Alaminos-Larnaca | 2023/05/04 10:00 | Guy Den Ouden v Filip Cristian Jianu | 6-7,1-6 |
| ITF M15 Alaminos-Larnaca | 2023/05/03 06:00 | Guy Den Ouden v Samuele Pieri | 6-3,6-4 |
| ITF M15 Alaminos-Larnaca | 2023/04/30 08:00 | Simon A Ivanov v Guy Den Ouden | 7-6,2-6,4-6 |
| ITF M15 Alaminos-Larnaca | 2023/04/29 08:00 | Sebastian Prechtel v Guy Den Ouden | 6-3,4-6,3-6 |