Stadium: Central Court (8) Round: 25 Ground: Clay
| ITF M25 Grodzisk Mazowiecki | 2021/08/02 14:25 | Svyatoslav Ilnytskyy v Tomas Lanik | 6-3,6-0 |
| ITF M25 Grodzisk Mazowiecki | 2021/08/02 08:00 | Adam Bronka v Svyatoslav Ilnytskyy | 5-7,0-6 |
| ITF M25 Grodzisk Mazowiecki | 2021/08/01 11:30 | Dario Drebenstedt v Svyatoslav Ilnytskyy | 5-7,4-6 |
| ITF M25 Wroclaw | 2021/06/27 09:30 | Edouard Villoslada v Svyatoslav Ilnytskyy | 6-7,6-3,10-6 |
| ITF M15 Novomoskovsk | 2021/05/31 06:15 | Simon A Ivanov v Svyatoslav Ilnytskyy | 6-1,6-3 |
| ITF M15 Novomoskovsk | 2021/05/24 12:00 | Svyatoslav Ilnytskyy v Aliaksandr Liaonenka | 4-6,3-6 |
| ITF M15 Antalya | 2020/12/21 10:50 | Simeon Terziev v Svyatoslav Ilnytskyy | 6-4,6-4 |
| ITF M15 Antalya | 2020/12/15 07:00 | Filip Misolic v Svyatoslav Ilnytskyy | 6-1,6-4 |
| Challenger Poznan | 2021/07/25 13:00 | Maks Kasnikowski v Christopher Heyman | 3-6,4-6 |
| Polish National Tour | 2021/07/15 09:15 | Kamil Majchrzak v Maks Kasnikowski | 6-4,6-2 |
| Polish National Tour | 2021/07/14 10:30 | Aleksander Orlikowski v Maks Kasnikowski | 7-6,3-6,1-6 |
| Polish National Tour | 2021/07/13 09:15 | Maks Kasnikowski v Pawel Juszczak | 7-6,7-6 |
| ITF M15 Monastir | 2021/04/01 08:30 | Sho Shimabukuro v Maks Kasnikowski | 6-4,5-7,7-6 |
| ITF M15 Monastir | 2021/03/30 10:30 | Aziz Ouakaa v Maks Kasnikowski | 0-6,1-6 |
| ITF M15 Monastir | 2021/03/23 11:05 | Jordan Correia v Maks Kasnikowski | 6-4,6-4 |
| ITF M25 Poznan | 2020/08/25 14:00 | Maks Kasnikowski v Jelle Sels | 6-3,4-6,2-6 |