Stadium: Court 14 Round: 26 Ground: Hardcourt outdoor
| ITF M15 - Heraklion | 2023/10/25 08:10 | Adam Heinonen v Graham Maassen | 6-4,6-3 |
| ITF M15 - Heraklion | 2023/10/24 06:30 | Niels Visker v Adam Heinonen | 6-4,3-6,6-10 |
| ITF M15 - Heraklion | 2023/10/23 10:30 | Piotr Siekanowicz v Adam Heinonen | 2-6,4-6 |
| ITF M15 - Heraklion | 2023/10/17 06:30 | Adam Heinonen v Ki Lung NG | 5-7,4-6 |
| ITF M25 - Falun | 2023/09/26 12:00 | Adam Heinonen v Evgeny Karlovskiy | 6-7,1-6 |
| ITF M25 - Falun | 2023/09/25 08:00 | Adam Heinonen v Jack Karlsson Winstrand | 6-1,6-3 |
| ITF M25 - Falun | 2023/09/24 07:55 | Adam Heinonen v Linus Videhult | 6-3,6-3 |
| ITF M15 - Danderyd | 2023/09/19 12:00 | Adam Heinonen v Jakob Schnaitter | 2-6,2-6 |
| 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 |
| ITF M25 - Oldenzaal | 2023/08/31 08:00 | Jeremy Jahn v Marlon Vankan | 7-6,6-2 |