Stadium: Court 4 Round: 44 Ground: Clay
| ITF M15 Sofia | 2023/07/02 11:00 | Ioannis Kountourakis v Daniele Minighini | 6-3,6-3 |
| ITF M15 Belgrade | 2023/06/26 10:00 | Maxence Rivet v Ioannis Kountourakis | 6-3,6-2 |
| ITF M15 Belgrade | 2023/06/25 07:00 | Stefan Micov v Ioannis Kountourakis | 6-4,3-6,8-10 |
| ITF M15 Heraklion | 2023/03/19 07:00 | Ioannis Kountourakis v Mark Neyelov | 3-6,3-6 |
| ITF M15 Sharm El Sheikh | 2023/02/20 09:00 | Ioannis Kountourakis v Ji Hoon Son | 3-6,1-6 |
| ITF M15 Sharm El Sheikh | 2023/02/19 11:30 | Ioannis Kountourakis v Ioan A Teglas | 6-3,7-5 |
| ITF M15 Sharm El Sheikh | 2023/02/14 08:00 | Sebastian Sorger v Ioannis Kountourakis | 6-4,6-3 |
| ITF M15 Sharm El Sheikh | 2023/02/13 08:00 | Ioannis Kountourakis v Matic Dimic | 7-5,0-6,10-8 |
| ITF M15 Wroclaw | 2023/06/26 12:00 | Jasza Szajrych v Adam Heinonen | 2-6,6-3,10-7 |
| ITF M15 Wroclaw | 2023/06/26 08:00 | Przemyslaw Michocki v Adam Heinonen | 2-6,0-6 |
| ITF M15 Wroclaw | 2023/06/25 10:30 | Joan Nadal Vives v Adam Heinonen | 5-7,0-6 |
| ITF M15 Saarlouis | 2023/06/22 14:55 | Adam Heinonen v Matthew Dellavedova | 3-6,6-3,3-6 |
| ITF M15 Saarlouis | 2023/06/21 09:30 | Zura Tkemaladze v Adam Heinonen | 0-6,4-6 |
| ITF M15 Saarlouis | 2023/06/19 13:00 | John Sperle v Adam Heinonen | 2-6,6-1,2-10 |
| ITF M15 Saarlouis | 2023/06/18 12:00 | Tomas Almeida v Adam Heinonen | 2-6,4-6 |
| UTR Pro Copenhagen | 2023/06/02 10:00 | Christian Sigsgaard v Adam Heinonen | 7-6,6-7,6-1 |