Stadium: Court 1 Round: 62 Ground: Clay
| ITF M15 Sofia | 2023/07/03 09:30 | Ioannis Kountourakis v Adam Heinonen | 6-7,5-7 |
| 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 M25 Telfs | 2023/07/17 07:00 | Francesco Ferrari v Stepan Mruzek | 6-2,6-1 |
| ITF M25 Telfs | 2023/07/16 09:00 | Stepan Mruzek v Kaj Quirijns | 6-1,6-3 |
| ITF M25 Kassel | 2023/07/11 11:10 | Milan Welte v Stepan Mruzek | 6-2,6-1 |
| ITF M25 Kassel | 2023/07/10 13:40 | Noel Larwig v Stepan Mruzek | 3-6,1-6 |
| ITF M25 Poprad | 2023/06/20 09:25 | Peter Benjamin Privara v Stepan Mruzek | 7-5,7-5 |
| ITF M25 Poprad | 2023/06/19 10:25 | Michal Krajci v Stepan Mruzek | 4-6,6-7 |
| ITF M25 Poprad | 2023/06/18 11:00 | Hans Albert Schubert v Stepan Mruzek | 3-6,5-7 |
| ITF M25 Jablonec Nad Nisou | 2023/05/28 13:00 | Peter Goldsteiner v Stepan Mruzek | 6-0,6-0 |