Stadium: Hard 21 Round: 25 Ground: Hardcourt outdoor
| ITF M25 Heraklion | 2023/11/07 09:05 | Sean Hodkin v Adam Heinonen | 4-6,1-6 |
| ITF M25 Heraklion | 2023/11/06 07:00 | Thomas Kostka v Adam Heinonen | 6-7,2-6 |
| ITF M15 Heraklion | 2023/10/28 08:00 | Valentin Royer v Adam Heinonen | 6-3,6-3 |
| ITF M15 Heraklion | 2023/10/27 07:00 | Guy Den Ouden v Adam Heinonen | 6-7,6-1,2-6 |
| 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 Heraklion | 2023/11/02 08:00 | Niels Visker v Sidane Pontjodikromo | 7-5,6-4 |
| ITF M25 Heraklion | 2023/11/01 07:00 | Dimitris Sakellaridis v Sidane Pontjodikromo | 2-6,2-6 |
| ITF M15 Heraklion | 2023/10/28 08:00 | Matthew William Donald v Sidane Pontjodikromo | 6-7,6-2,6-4 |
| ITF M15 Heraklion | 2023/10/26 06:30 | Sidane Pontjodikromo v Alexandros Skorilas | 6-4,3-6,7-5 |
| ITF M15 Heraklion | 2023/10/25 06:30 | Sidane Pontjodikromo v Andrew Fenty | 6-1,6-7,6-0 |
| ITF M15 Heraklion | 2023/10/20 07:00 | Alexandros Skorilas v Sidane Pontjodikromo | 6-3,6-2 |
| ITF M15 Heraklion | 2023/10/19 06:30 | Ioannis Kountourakis v Sidane Pontjodikromo | 4-6,6-2,2-6 |
| ITF M15 Heraklion | 2023/10/17 09:00 | Kevin Edengren v Sidane Pontjodikromo | 0-6,3-6 |