Stadium: Court 2 Round: 25 Ground: Hardcourt indoor
| ITF M15 - Opava | 2021/11/18 11:20 | David Poljak v Ondrej Horak | 6-3,6-3 |
| ITF M15 - Opava | 2021/11/21 09:00 | David Poljak v Marvin Moeller | 6-3,7-6 |
| ITF M15 - Opava | 2021/11/20 09:00 | David Poljak v Sean Cuenin | 6-4,6-2 |
| ITF M15 - Opava | 2021/11/19 09:00 | David Poljak v Andrew Paulson | 6-2,4-6,7-6 |
| ITF M15 - Opava | 2021/11/18 11:20 | David Poljak v Ondrej Horak | 6-3,6-3 |
| ITF M15 - Opava | 2021/11/17 09:00 | David Poljak v Lukas Palovic | 6-3,7-5 |
| Challenger - Ortisei | 2021/11/07 09:30 | David Poljak v Filip Misolic | 4-6,6-7 |
| ITF - M15 Sharm-el-Sheikh | 2021/10/21 08:00 | Lukas Krainer v David Poljak | 3-6,6-4,6-2 |
| ITF - M15 Sharm-el-Sheikh | 2021/10/20 11:25 | Arjun Mahadevan v David Poljak | 1-6,1-6 |
| ITF M15 - Opava | 2021/11/18 11:20 | David Poljak v Ondrej Horak | 6-3,6-3 |
| ITF M15 - Opava | 2021/11/16 10:55 | Ondrej Valek v Ondrej Horak | 5-7,6-7 |
| ITF - M15 Sharm-el-Sheikh | 2021/11/03 13:00 | Saba Purtseladze v Ondrej Horak | 6-2,4-6,6-2 |
| ITF - M15 Sharm-el-Sheikh | 2021/11/02 07:30 | Leonid Sheyngezikht v Ondrej Horak | 7-6,1-6,9-11 |
| 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 |