Stadium: Court 3 Round: 26 Ground: Hardcourt outdoor
| ITF M15 Sharm El Sheikh | 2021/10/13 08:00 | Marek Gengel v Romain Faucon | 6-2,6-4 |
| ITF M25 Prague | 2021/10/08 09:00 | Khumoyun Sultanov v Marek Gengel | 3-6,6-3,6-4 |
| ITF M25 Prague | 2021/10/07 10:15 | Jakub Paul v Marek Gengel | 2-6,4-6 |
| ITF M25 Prague | 2021/10/06 12:10 | Martin Krumich v Marek Gengel | 7-5,5-7,4-6 |
| Challenger Orleans | 2021/09/26 12:50 | Maxime Janvier v Marek Gengel | 6-2,7-5 |
| Challenger Biel | 2021/09/19 12:40 | Alexander Shevchenko v Marek Gengel | 6-3,6-3 |
| Challenger Rennes | 2021/09/12 08:00 | Kenny de Schepper v Marek Gengel | 6-4,6-1 |
| Challenger Tulln | 2021/09/05 10:25 | Mate Valkusz v Marek Gengel | 6-0,6-1 |
| ITF M15 Sharm El Sheikh | 2021/10/13 08:00 | Michal Mikula v Andrea Guerrieri | 7-6,7-6 |
| ITF M15 Sharm El Sheikh | 2021/10/06 12:30 | Michal Mikula v Romain Faucon | 1-6,4-6 |
| ITF M25 Poznan | 2021/08/27 09:30 | Matias Zukas v Michal Mikula | 6-3,6-1 |
| ITF M25 Poznan | 2021/08/26 14:25 | Jose Pereira v Michal Mikula | 6-3,2-6,5-7 |
| ITF M25 Poznan | 2021/08/25 13:10 | Michal Mikula v Yshai Oliel | 6-3,6-4 |
| ITF M25 Poznan | 2021/08/24 14:00 | Ivan Kazakov v Michal Mikula | 1-6,2-6 |
| ITF M25 Poznan | 2021/08/22 08:00 | Lars Aregger v Michal Mikula | 1-6,0-6 |
| ITF M15 Lodz | 2021/08/18 08:00 | Valerio Aboian v Michal Mikula | 6-4,6-3 |