Stadion: Court 2 Round: 25 Ground: Clay
| 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 - Jönköping | 2021/09/21 07:30 | Arvid Nordquist v Khumoyun Sultanov | 3-6,3-6 |
| Davis Cup | 2021/09/17 15:50 | Casper Ruud v Khumoyun Sultanov | 6-3,6-3 |
| ITF - M25 - Pardubice | 2021/09/19 09:00 | Matthias Uwe Kask v Vojtech Mares | 6-4,4-6,10-3 |
| ITF - M25 - Prostejov | 2021/08/16 09:40 | Christopher Patzanovsky v Vojtech Mares | 6-2,6-0 |
| ITF - M25 - Most | 2021/05/24 08:00 | Petr Cervinka v Vojtech Mares | 3-6,6-0,11-9 |
| ITF - M25 - Most | 2021/05/23 08:00 | Kris Krawcewicz v Vojtech Mares | 4-6,5-7 |
| ITF - M25 - Jablonec Nad Nisou | 2021/05/17 07:30 | Vojtech Mares v Gianluca Coloma-Heck | 6-2,4-6,4-10 |
| ITF - M25 - Jablonec Nad Nisou | 2021/05/16 08:30 | Jiri Krouzek v Vojtech Mares | 4-6,5-7 |
| ITF - M15 - Antalya | 2021/04/26 07:00 | Denis Klok v Vojtech Mares | 6-3,6-2 |
| ITF - M15 - Antalya | 2021/04/25 07:00 | Flemming Peters v Vojtech Mares | 3-6,3-6 |