Stadium: Hard 20 Round: 62 Ground: Hardcourt outdoor
| ITF M15 Heraklion | 2023/11/20 11:00 | Nazar Oliynykov v Dimitris Sakellaridis | 6-0,6-0 |
| ITF M15 Heraklion | 2023/11/19 11:00 | Denis Constantin Spiridon v Nazar Oliynykov | 6-1,3-6,5-10 |
| ITF M25 Heraklion | 2023/11/14 07:30 | Benjamin Pietri v Nazar Oliynykov | 6-1,6-3 |
| ITF M25 Heraklion | 2023/11/13 08:30 | Mateusz Kulakowski v Nazar Oliynykov | 1-6,7-5,3-10 |
| ITF M25 Heraklion | 2023/10/29 07:00 | Nazar Oliynykov v Kevin Edengren | 2-6,0-6 |
| ITF M15 Heraklion | 2023/10/22 11:00 | Eleftherios Neos v Nazar Oliynykov | 3-6,6-3,13-11 |
| ITF M15 Pirot | 2023/09/04 10:00 | Lazar Vojinovic v Nazar Oliynykov | 6-3,6-3 |
| ITF M15 Pirot | 2023/09/03 11:30 | Shendrit Deari v Nazar Oliynykov | 3-6,6-3,8-10 |
| ITF M15 Heraklion | 2023/11/20 11:00 | Thomas Kostka v Anthony Genov | 4-6,6-4,10-5 |
| ITF M15 Heraklion | 2023/11/20 07:00 | Sergo Sikharulidze v Thomas Kostka | 0-6,0-6 |
| ITF M25 Heraklion | 2023/11/12 13:00 | Sergis Kyratzis v Thomas Kostka | 7-6,6-2 |
| ITF M25 Heraklion | 2023/11/06 07:00 | Thomas Kostka v Adam Heinonen | 6-7,2-6 |
| ITF M25 Heraklion | 2023/11/05 09:00 | Dario Drebenstedt v Thomas Kostka | 2-6,0-6 |
| ITF M15 Heraklion | 2023/10/23 10:30 | Thomas Kostka v Andrew Fenty | 5-7,6-4,9-11 |
| ITF M15 Heraklion | 2023/10/22 09:30 | Thomas Kostka v Ighor Halmenschlager Reis | 6-3,6-1 |
| ITF M15 Heraklion | 2023/10/18 09:25 | Benjamin Pietri v Thomas Kostka | 6-3,6-2 |