| UTR Pro Tennis Series - Barcelona | 2021/08/09 13:45 | Markos Kalovelonis v Jaume Pla Malfeito | 6-3,5-3 |
| ITF - M25 - Telawi | 2021/07/30 06:00 | Marco De Rossi v Markos Kalovelonis | 6-3,6-3 |
| Challenger - Nur-Sultan - Qualifikation | 2021/07/18 04:00 | Markos Kalovelonis v Sanjar Fayziev | 7-6,3-6,6-7 |
| ITF - M25 - Nur-Sultan | 2021/07/07 07:00 | Markos Kalovelonis v Lucas Catarina | 6-4,6-7,2-6 |
| ITF - M15 - Shymkent | 2021/06/03 07:25 | Vladyslav Manafov v Markos Kalovelonis | 6-1,3-6,6-3 |
| ITF - M15 - Shymkent | 2021/06/02 07:05 | Saba Purtseladze v Markos Kalovelonis | 0-6,3-6 |
| 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 |
| UTR Pro Tennis Series - Barcelona | 2021/08/09 11:30 | Andrey Chepelev v Olexiy Kolisnyk | 2-6,4-6 |
| ITF - M15 - Xativa | 2021/08/04 08:40 | Andrey Chepelev v Fausto Tabacco | 6-7,7-5,6-7 |
| ITF - M25 - Denia | 2021/07/27 10:00 | Andrey Chepelev v Inaki Montes-De La Torre | 6-3,3-6,8-10 |
| ITF - M25 - Denia | 2021/07/26 14:30 | Andrey Chepelev v Xavier Gabarro | 6-4,6-0 |
| ITF - M25 - Denia | 2021/07/25 09:30 | Andrey Chepelev v Max Ginefri | 6-4,6-2 |
| ITF - M25 - Gandia | 2021/07/22 08:00 | Andrey Chepelev v Francisco Andreu Garcia | 4-6,6-2,5-7 |
| ITF - M25 - Gandia | 2021/07/21 11:20 | Coleman Wong v Andrey Chepelev | 4-6,4-6 |
| ITF - M25 - Idanha-A-Nova | 2021/07/14 08:00 | Andrey Chepelev v Francisco Cabral | 1-6,3-6 |