Stadium: Court 1 Round: 25 Ground: Hardcourt outdoor
| ITF M25 Budapest | 2021/09/27 12:10 | Edward Hubner v Svyatoslav Ilnytskyy | 5-7,4-6 |
| ITF M15 Vyshkovo | 2021/09/20 07:00 | Federico Campana v Svyatoslav Ilnytskyy | 6-1,6-1 |
| ITF M15 Vyshkovo | 2021/09/20 06:00 | Jasza Szajrych v Svyatoslav Ilnytskyy | 4-6,4-6 |
| ITF M15 Chornomorsk | 2021/08/30 07:00 | Artem Podorozhnyi v Svyatoslav Ilnytskyy | 6-3,6-4 |
| ITF M25 Poznan | 2021/08/24 08:00 | Dominique Graf v Svyatoslav Ilnytskyy | 6-4,2-6,10-6 |
| ITF M25 Poznan | 2021/08/22 08:00 | Svyatoslav Ilnytskyy v Matteo Meneghetti | 6-2,6-3 |
| ITF M15 Lodz | 2021/08/15 08:00 | Svyatoslav Ilnytskyy v Mikolaj Borkowski | 4-6,6-3,5-10 |
| ITF M15 Gdynia | 2021/08/09 08:00 | Svyatoslav Ilnytskyy v Antonin Bolardt | 4-6,5-7 |
| ITF M15 Zlatibor | 2021/09/15 11:35 | Sebastian Gima v Peter Fajta | 6-4,2-6,6-4 |
| ITF M15 Bad Waltersdorf | 2021/08/25 06:55 | Peter Fajta v Davide Galoppini | 4-6,3-6 |
| ITF M15 Bratislava | 2021/08/21 08:00 | Mate Valkusz v Peter Fajta | 6-4,6-4 |
| ITF M15 Bratislava | 2021/08/20 10:00 | David Pichler v Peter Fajta | 4-6,5-7 |
| ITF M15 Bratislava | 2021/08/19 08:00 | Jonathan Mridha v Peter Fajta | 6-7,5-7 |
| ITF M15 Bratislava | 2021/08/17 10:30 | Peter Fajta v Danylo Kalenichenko | 4-6,6-3,6-2 |
| ITF M15 Novi Sad | 2021/08/04 11:20 | Viktor Jovic v Peter Fajta | 4-6,6-7 |
| ITF M15 Novi Sad | 2021/07/28 09:40 | Nicolae Frunza v Peter Fajta | 6-4,6-2 |