Stadium: Court 4 Round: 62 Ground: Hardcourt outdoor
| ITF M15 Skopje | 2021/06/07 08:30 | Leonid Sheyngezikht v Ondrej Horak | 6-0,7-5 |
| ITF M15 Sharm El Sheikh | 2021/10/27 11:25 | Yuichiro Inui v Leonid Sheyngezikht | 4-6,6-4,6-2 |
| ITF M15 Sharm El Sheikh | 2021/10/20 09:05 | Sergei Pogosian v Leonid Sheyngezikht | 2-6,6-3,6-2 |
| ITF M15 Sharm El Sheikh | 2021/10/12 09:25 | Leonid Sheyngezikht v Seydina Andre | 6-2,4-6,4-10 |
| ITF M15 Sharm El Sheikh | 2021/10/11 11:00 | Leonid Sheyngezikht v Bryan Aguiar Kuntz | 6-2,6-3 |
| ITF M25 Pretoria | 2021/09/29 11:30 | Leonid Sheyngezikht v Makoto Ochi | 3-6,6-7 |
| ITF M25 Johannesburg | 2021/09/22 10:10 | Leonid Sheyngezikht v Menelaos Efstathiou | 1-6,1-6 |
| ITF M25 Johannesburg | 2021/09/21 07:00 | Leonid Sheyngezikht v Ethan D Sibanda | 6-1,6-0 |
| ITF M25 Johannesburg | 2021/09/20 07:00 | Leonid Sheyngezikht v Andreas Scott | 6-2,6-1 |
| ITF M15 Sharm El Sheikh | 2021/11/01 09:00 | Mohab Hamed v Ondrej Horak | 2-6,2-6 |
| ITF M15 Sharm El Sheikh | 2021/10/31 11:30 | Eirik Groener v Ondrej Horak | 4-6,4-6 |
| ITF M15 Sharm El Sheikh | 2021/10/24 08:00 | Ondrej Horak v Nikoloz Davlianidze | 6-1,6-7,8-10 |
| ITF M15 Sharm El Sheikh | 2021/10/20 10:15 | Marek Gengel v Ondrej Horak | 6-0,6-2 |
| ITF M15 Sharm El Sheikh | 2021/10/19 07:25 | Sergei Pogosian v Ondrej Horak | 4-6,6-2,10-3 |
| ITF M15 Sharm El Sheikh | 2021/10/18 08:00 | Pavlos Parson v Ondrej Horak | 3-6,6-1,9-11 |
| ITF M25 Prague | 2021/10/04 11:15 | Artem Dubrivnyy v Ondrej Horak | 6-4,6-0 |
| ITF M25 Prague | 2021/10/03 10:30 | Matej Galik v Ondrej Horak | 3-6,1-6 |