Stadium: Court 11 (M 15) Round: 26 Ground: Clay
| ITF M15 Shymkent | 2021/04/07 03:50 | Denis Klok v Islam Orynbasar | 6-1,6-2 |
| ITF M15 Kazan | 2021/03/09 12:15 | Sergey Fomin v Denis Klok | 6-2,6-4 |
| ITF M15 Antalya | 2021/02/07 06:00 | Benedikt Henning v Denis Klok | 6-1,6-1 |
| ITF M25 Villena | 2021/02/01 10:30 | Denis Klok v Alejandro Manzanera Pertusa | 2-6,2-6 |
| ITF M25 Villena | 2021/01/31 10:30 | Denis Klok v Mario Mansilla Diez | 6-2,6-3 |
| ITF M15 Manacor | 2021/01/05 14:00 | Denis Klok v Alberto Barroso Campos | 1-6,3-6 |
| ITF M15 Manacor | 2021/01/04 11:30 | Denis Klok v Peter Benjamin Privara | 6-0,5-7,15-13 |
| ITF M15 Antalya | 2020/03/12 07:55 | Sergi Perez Contri v Denis Klok | 6-4,6-2 |
| ITF M15 Shymkent | 2021/04/07 05:40 | Dostanbek Tashbulatov v Mark Whitehouse | 6-4,6-4 |
| Challenger Nur-Sultan Qual | 2021/02/28 04:00 | Julian Lenz v Dostanbek Tashbulatov | 6-4,6-3 |
| Challenger Nur-Sultan | 2021/02/24 08:30 | Dostanbek Tashbulatov v Prajnesh Gunneswaran | 2-6,3-6 |
| ITF M15 Nur-Sultan | 2021/02/10 07:30 | Matteo Donati v Dostanbek Tashbulatov | 7-5,6-2 |
| ITF M15 Nur-Sultan | 2021/02/04 05:00 | Aleksandre Metreveli v Dostanbek Tashbulatov | 0-6,6-4,6-4 |
| ITF M15 Antalya | 2021/01/18 07:00 | Admir Kalender v Dostanbek Tashbulatov | 6-3,6-1 |
| ITF M15 Antalya | 2021/01/17 09:00 | Simone Cacciapuoti v Dostanbek Tashbulatov | 1-6,2-6 |
| ITF M15 Antalya | 2021/01/10 06:00 | Dostanbek Tashbulatov v Jorge Martinez Martinez | 1-6,1-6 |