Stadium: Court 3 Round: 25 Ground: Hardcourt outdoor
| ITF - M15 Sharm El Sheikh | 2021/10/17 08:00 | Marek Gengel v Peter Fajta | 6-4,6-0 |
| ITF - M15 Sharm El Sheikh | 2021/10/16 08:00 | Marek Gengel v Nam Hoang Ly | 7-6,5-7,7-6 |
| ITF - M15 Sharm El Sheikh | 2021/10/15 08:00 | Marek Gengel v Neil Oberleitner | 6-2,6-1 |
| ITF - M15 Sharm El Sheikh | 2021/10/14 08:00 | Marek Gengel v Michal Mikula | 6-4,6-3 |
| ITF - M15 Sharm El Sheikh | 2021/10/13 08:00 | Marek Gengel v Romain Faucon | 6-2,6-4 |
| ITF M25 - Praga | 2021/10/08 09:00 | Khumoyun Sultanov v Marek Gengel | 3-6,6-3,6-4 |
| ITF M25 - Praga | 2021/10/07 10:15 | Jakub Paul v Marek Gengel | 2-6,4-6 |
| ITF M25 - Praga | 2021/10/06 12:10 | Martin Krumich v Marek Gengel | 7-5,5-7,4-6 |
| 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 - Praga | 2021/10/04 11:15 | Artem Dubrivnyy v Ondrej Horak | 6-4,6-0 |
| ITF M25 - Praga | 2021/10/03 10:30 | Matej Galik v Ondrej Horak | 3-6,1-6 |
| ITF - M25 Pardubice | 2021/09/20 10:00 | Matyas Cerny v Ondrej Horak | 6-2,3-6,10-6 |
| ITF - M25 Ricany | 2021/08/29 08:00 | Ondrej Horak v Lambert Ruland | 1-6,1-6 |
| ITF - M15 Bad Waltersdorf | 2021/08/23 09:00 | Ondrej Horak v Alessandro Ragazzi | 3-6,6-4,4-10 |
| ITF - M15 Warmbad-Villach | 2021/08/17 08:00 | Philip Bachmaier v Ondrej Horak | 6-2,6-0 |