Stadium: Court 1 Round: 25 Ground: Hardcourt outdoor
| 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 |
| ITF M15 Antalya | 2021/01/08 06:30 | Davide Galoppini v Dostanbek Tashbulatov | 6-2,7-5 |
| Challenger Oeiras | 2021/03/28 10:00 | Francisco Cabral v Ivan Nedelko | 6-2,5-7,6-4 |
| Challenger Zadar | 2021/03/25 09:30 | Nikola Milojevic v Ivan Nedelko | 6-2,6-1 |
| Challenger Zadar | 2021/03/23 13:30 | Teymuraz Gabashvili v Ivan Nedelko | 2-6,6-2,3-6 |
| Challenger Zadar | 2021/03/22 09:00 | Ivan Nedelko v Nerman Fatic | 6-4,1-6,3-6 |
| Challenger Zadar | 2021/03/21 11:30 | Ivan Nedelko v Noa Vukadin | 4-6,6-2,6-1 |
| ITF M15 Rovinj | 2021/03/18 09:00 | Ivan Nedelko v Timo Legout | 6-4,4-6,3-6 |
| ITF M15 Rovinj | 2021/03/17 12:50 | Ivan Nedelko v Lucas Bouquet | 6-1,3-6,6-1 |
| Challenger St. Petersburg Qual | 2021/03/07 11:20 | Jiri Lehecka v Ivan Nedelko | 6-1,6-3 |