Estadio: Court 1 Round: 27 Ground: Clay
| ITF M25 Praga | 2021/10/07 08:00 | Khumoyun Sultanov v Andrew Paulson | 4-6,6-3,6-2 |
| ITF M25 Praga | 2021/10/06 08:00 | Khumoyun Sultanov v Vojtech Mares | 7-5,6-0 |
| ITF M25 Falun | 2021/10/01 14:30 | Khumoyun Sultanov v Valentin Royer | 2-6,3-6 |
| ITF M25 Falun | 2021/09/30 16:15 | Daniel Little v Khumoyun Sultanov | 4-6,2-6 |
| ITF M25 Falun | 2021/09/29 11:00 | Yusuke Takahashi v Khumoyun Sultanov | 2-6,0-6 |
| ITF M25 Falun | 2021/09/28 11:00 | Vladimir Ivanov v Khumoyun Sultanov | 1-6,6-7 |
| ITF M25 Jönköping | 2021/09/23 08:00 | Evgeny Karlovskiy v Khumoyun Sultanov | 6-3,6-2 |
| ITF M25 Jönköping | 2021/09/22 09:55 | Elmer Moller v Khumoyun Sultanov | 2-6,6-4,2-6 |
| 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 |
| Challenger de Orleans | 2021/09/26 12:50 | Maxime Janvier v Marek Gengel | 6-2,7-5 |
| Challenger de Biena | 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 de Tulln | 2021/09/05 10:25 | Mate Valkusz v Marek Gengel | 6-0,6-1 |
| ITF M25 Ricany | 2021/09/03 08:25 | Marek Gengel v Yshai Oliel | 3-6,6-4,4-6 |
| ITF M25 Ricany | 2021/09/02 07:55 | Filip Duda v Marek Gengel | 3-6,3-6 |