Stadium: Court 1 Round: 25 Ground: Hardcourt outdoor
| Kazakhstan F6, Singles | 2015/10/14 04:30 | Tashbulatov, Dostanbek v Kalovelonis, Markos | 0-6,1-6 |
| ITF M25 Pretoria | 2021/09/29 11:30 | Kalovelonis, Markos v Pervolarakis, Michail | 3-6,2-6 |
| ITF M25 Johannesburg | 2021/09/23 08:00 | Montsi, Khololwam v Kalovelonis, Markos | 6-1,6-3 |
| ITF M25 Johannesburg | 2021/09/22 08:35 | Kalovelonis, Markos v Makoto Ochi | 6-4,6-4 |
| ITF M25 Lesa | 2021/08/25 10:45 | Basso, Andrea v Kalovelonis, Markos | 6-3,6-2 |
| UTR Pro Tennis Series Barcelona | 2021/08/14 08:40 | Carretero, Pablo v Kalovelonis, Markos | 6-7,1-0 |
| UTR Pro Tennis Series Barcelona | 2021/08/12 13:00 | Kalovelonis, Markos v Kolisnyk, Olexiy | 4-6,4-6 |
| UTR Pro Tennis Series Barcelona | 2021/08/11 07:00 | Kalovelonis, Markos v Gabarro, Xavier | 6-3,6-0 |
| UTR Pro Tennis Series Barcelona | 2021/08/10 10:00 | Kalovelonis, Markos v Andrey Chepelev | 6-7,6-2,3-5 |
| ITF M15 Kazan | 2021/10/13 11:45 | Tashbulatov, Dostanbek v Marat Sharipov | 3-6,2-6 |
| ITF M15 Chornomorsk | 2021/09/02 11:55 | Artem Podorozhnyi v Tashbulatov, Dostanbek | 6-4,3-6,6-3 |
| ITF M15 Chornomorsk | 2021/08/31 08:45 | Richard Zusman v Tashbulatov, Dostanbek | 6-7,5-7 |
| ITF - M15 Monastir | 2021/08/24 08:30 | Tashbulatov, Dostanbek v Brymer, Gage | 2-6,2-6 |
| ITF - M15 Monastir | 2021/08/15 09:30 | Tashbulatov, Dostanbek v Sookton-Eng, Chanchai | 6-7,2-6 |
| ITF M15 Telavi | 2021/08/06 06:20 | Tashbulatov, Dostanbek v Bondarevskiy, Yan | 1-6,1-6 |
| ITF M15 Telavi | 2021/08/05 06:30 | Ivanov, Simon Anthony v Tashbulatov, Dostanbek | 6-4,4-6,2-6 |
| ITF M15 Telavi | 2021/08/03 05:35 | Tashbulatov, Dostanbek v Alibek Kachmazov | 6-1,6-2 |