Stadium: Centre Court Round: 26 Ground: Hardcourt outdoor
| ITF M25 Madrid | 2023/12/05 08:00 | Adam Heinonen v Joris Moret | 3-6,7-5,7-10 |
| ITF M25 Madrid | 2023/12/04 09:30 | Adam Heinonen v Manel L Juncadella | 6-2,6-0 |
| ITF M25 Madrid | 2023/12/03 14:00 | Adam Heinonen v Sergi Fita Juan | 6-4,6-1 |
| ITF M15 Madrid | 2023/11/28 10:00 | Adam Heinonen v David Perez Sanz | 3-6,6-4,2-6 |
| ITF M25 Heraklion | 2023/11/08 12:15 | Adam Heinonen v Sidane Pontjodikromo | 6-3,2-6,4-6 |
| 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 |
| UTR Pro Athens | 2023/12/17 13:00 | Ioannis Xilas v Gergely Madarasz | 6-3,2-6,7-6 |
| UTR Pro Athens | 2023/12/17 08:30 | Ioannis Xilas v Ivan Denisov | 6-4,6-1 |
| UTR Pro Athens | 2023/12/14 11:45 | Ioannis Xilas v Lefteris Neos | 6-3,6-2 |
| UTR Pro Athens | 2023/12/13 06:00 | Ioannis Xilas v David Schwarc | 6-3,6-2 |
| UTR Pro Athens | 2023/12/12 06:00 | Ioannis Xilas v Illya Beloborodko | 6-3,7-5 |
| UTR Pro Athens | 2023/12/11 10:10 | Ioannis Xilas v Ioannis Kountourakis | 6-4,6-0 |
| ITF M25 Heraklion | 2023/11/29 10:55 | Ioannis Xilas v Neil Oberleitner | 2-6,2-6 |
| ITF M15 Heraklion | 2023/11/25 08:00 | Ioannis Xilas v Alastair Gray | 5-7,0-6 |