Round: 26 Ground: Hardcourt outdoor
| ITF M25 Heraklion | 2023/11/29 09:15 | Ioannis Kountourakis v Max Benaim | 5-7,3-6 |
| ITF M15 Heráklion | 2023/11/21 07:00 | Ioannis Kountourakis v Rodrigo Alujas | 6-4,3-6,5-10 |
| ITF M15 Heráklion | 2023/11/20 10:00 | Ioannis Kountourakis v Arthur Van Der Kooij | 7-6,6-3 |
| ITF M25 Heraklion | 2023/11/13 13:45 | Ioannis Kountourakis v Noah Merre | 6-7,1-6 |
| ITF M25 Heraklion | 2023/11/12 13:00 | Ioannis Kountourakis v Tom Varzandeh | 6-3,6-3 |
| ITF M25 Heraklion | 2023/11/07 10:15 | Daniele Rapagnetta v Ioannis Kountourakis | 6-4,7-5 |
| ITF M25 Heraklion | 2023/11/05 11:00 | Kevin Edengren v Ioannis Kountourakis | 2-6,6-7 |
| ITF M25 Heraklion | 2023/11/01 10:10 | Ioannis Kountourakis v Enrico Dalla Valle | 4-6,1-6 |
| ITF M25 Heraklion | 2023/12/01 10:50 | Pavlos Tsitsipas v Marek Gengel | 6-3,2-6,2-6 |
| ITF M25 Heraklion | 2023/11/30 07:30 | Max Benaim v Marek Gengel | 1-6,2-6 |
| ITF M25 Heraklion | 2023/11/29 08:50 | Evangelos Kypriotis v Marek Gengel | 0-6,1-6 |
| ITF M25 Vale Do Lobo | 2023/11/15 10:00 | Pietro Pampanin v Marek Gengel | 6-4,6-3 |
| ITF M25 Sharm El Sheikh | 2023/11/02 08:00 | Marek Gengel v Harrison Adams | 6-7,1-6 |
| ITF M25 Sharm El Sheikh | 2023/11/01 09:45 | Marek Gengel v Akram El Sallaly | 6-4,6-2 |
| ITF M15 Sharm El Sheikh | 2023/10/20 07:00 | Marek Gengel v Yurii Dzhavakian | 2-6,2-6 |
| ITF M15 Sharm El Sheikh | 2023/10/19 08:15 | Marek Gengel v Nicolo Consonni | 6-3,6-4 |