Stadium: Hard Court 3 Round: 62 Ground: Hardcourt outdoor
| 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 M25 - Osijek | 2023/08/07 12:15 | Nazar Oliynykov v Jaka Protic Zakelj | 1-6,5-7 |
| ITF M25 - Osijek | 2023/08/06 10:00 | Peter Nad v Nazar Oliynykov | 2-6,6-1,5-10 |
| ITF M15 - Novi Sad | 2023/08/01 11:35 | Sergei Pogosian v Nazar Oliynykov | 6-1,6-2 |
| ITF M15 - Novi Sad | 2023/08/01 07:30 | Nazar Oliynykov v Marko Andrejic | 7-5,6-1 |
| ITF - M25 Heraklion | 2023/11/06 07:00 | Sean Hodkin v Piotr Kusiewicz | 4-6,6-3,10-4 |
| ITF - M25 Heraklion | 2023/11/05 09:00 | Daniel Blazka v Piotr Kusiewicz | 4-6,3-6 |
| ITF - M25 Heraklion | 2023/10/31 09:10 | Daniele Rapagnetta v Piotr Kusiewicz | 6-2,6-4 |
| ITF - M25 Heraklion | 2023/10/30 09:30 | Andreas Loizas v Piotr Kusiewicz | 4-6,7-6,8-10 |
| ITF - M15 Heraklion | 2023/10/22 09:30 | Piotr Kusiewicz v Vojtech Mares | 5-7,6-4,7-10 |
| ITF - M15 Heraklion | 2023/10/16 07:00 | Piotr Kusiewicz v Benoit Torcq | 6-2,1-6,6-10 |
| ITF M15 - Koszalin | 2023/09/06 07:30 | Valerio Perruzza v Piotr Kusiewicz | 6-1,6-4 |
| ITF M15 - Koszalin | 2023/09/05 07:30 | Piotr Kusiewicz v Piotr Siekanowicz | 5-7,7-6,8-10 |