Stadium: Court 14 Round: 26 Ground: Hardcourt outdoor
| ITF M25 - Heraklion | 2023/11/01 12:00 | Stefanos Sakellaridis v Guy Den Heijer | 7-5,3-6,6-7 |
| ITF M25 - Heraklion | 2023/10/31 07:00 | Guy Den Heijer v Joshua Charlton | 6-4,7-5 |
| ITF M25 - Heraklion | 2023/10/30 09:30 | Guy Den Heijer v Gabriel Matuszewski | 6-1,6-4 |
| ITF M15 - Heraklion | 2023/10/25 08:55 | Mario G Fernandez v Guy Den Heijer | 6-1,6-3 |
| ITF M15 - Heraklion | 2023/10/24 06:30 | Guy Den Heijer v Joshua Charlton | 7-6,7-5 |
| ITF M15 - Heraklion | 2023/10/23 10:30 | Guy Den Heijer v Vojtech Mares | 5-7,7-6,10-6 |
| ITF M15 - Heraklion | 2023/10/19 08:45 | Guy Den Heijer v Gabriel Decamps | 2-6,4-6 |
| ITF M25 - Santa Margherita | 2023/09/25 08:00 | Niels Visker v Guy Den Heijer | 5-7,6-4,11-9 |
| ITF M25 - Heraklion | 2023/10/31 09:00 | Marlon Vankan v Pavlos Tsitsipas | 6-4,6-4 |
| ITF M15 - Heraklion | 2023/10/25 10:45 | Louis Dussin v Marlon Vankan | 6-7,7-5,1-6 |
| ITF M25 - Tavira | 2023/10/18 10:00 | Martin Landaluce v Marlon Vankan | 6-3,6-4 |
| ITF M25 - Tavira | 2023/10/11 15:50 | Tiago Pereira v Marlon Vankan | 7-6,6-3 |
| ITF M25 - Nevers | 2023/10/06 14:35 | Marlon Vankan v Marvin Moeller | 3-6,2-6 |
| ITF M25 - Nevers | 2023/10/05 14:00 | Marlon Vankan v Tom Paris | 7-5,6-4 |
| ITF M25 - Nevers | 2023/10/04 08:00 | Marlon Vankan v Adan Freire Da Silva | 6-4,6-4 |
| Challenger - Bad Waltersdorf | 2023/09/17 10:10 | Sandro Kopp v Marlon Vankan | 6-2,3-6,6-2 |