Stadium: Court 1 Round: 25 Ground: Hardcourt outdoor
| ITF Kazakhstan F6 | 2015/10/14 04:30 | Dostanbek Tashbulatov v Markos Kalovelonis | 0-6,1-6 |
| ITF M15 Shymkent | 2021/05/27 05:00 | Markos Kalovelonis v Ivan Liutarevich | 4-6,6-3,6-7 |
| ITF M15 Shymkent | 2021/05/26 04:00 | Vladyslav Manafov v Markos Kalovelonis | 2-6,6-3,3-6 |
| ITF M15 Tbilisi | 2021/05/20 06:00 | Markos Kalovelonis v Benjamin Lock | 4-6,4-6 |
| ITF M15 Tbilisi | 2021/05/19 07:25 | Keenan Mayo v Markos Kalovelonis | 4-6,7-6,3-6 |
| ITF M15 Antalya | 2021/04/08 07:00 | Markos Kalovelonis v Adam Pavlasek | 6-3,6-7,0-6 |
| ITF M15 Antalya | 2021/04/07 08:50 | Markos Kalovelonis v Cheong-Eui Kim | 6-2,6-4 |
| ITF M15 Monastir | 2021/03/17 10:30 | Savva Polukhin v Markos Kalovelonis | 7-6,6-4 |
| ITF M15 Monastir | 2021/03/07 08:00 | Markos Kalovelonis v Savva Polukhin | 5-7,6-4,6-10 |
| ITF M15 Shymkent | 2021/05/25 09:15 | Dostanbek Tashbulatov v Tak Khunn Wang | 1-6,0-6 |
| ITF M15 Shymkent | 2021/04/15 06:30 | Dostanbek Tashbulatov v Luca Tomasetto | 4-6,4-6 |
| ITF M15 Shymkent | 2021/04/14 07:00 | Mark Whitehouse v Dostanbek Tashbulatov | 4-6,4-6 |
| ITF M15 Shymkent | 2021/04/09 07:10 | Aleksandr Braynin v Dostanbek Tashbulatov | 7-6,1-6,6-4 |
| ITF M15 Shymkent | 2021/04/08 05:30 | Denis Klok v Dostanbek Tashbulatov | 2-6,4-6 |
| 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 |