Stadion: Center Round: 26 Ground: Hardcourt outdoor
| 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 - Heraklion | 2020/11/25 07:30 | Markos Kalovelonis v Lucas Gerch | 2-6,2-6 |
| ITF - M15 - Heraklion | 2020/11/18 07:30 | Evan Furness v Markos Kalovelonis | 6-3,6-4 |
| ITF - M15 - Heraklion | 2020/11/12 11:00 | Luke Johnson v Markos Kalovelonis | 6-3,6-3 |
| ITF - M15 - Tbilisi | 2021/05/19 07:35 | Aliaksandr Liaonenka v Benjamin Lock | 3-6,3-6 |
| ITF - M15 - Monastir | 2021/05/13 10:30 | Benjamin Lock v Mattia Frinzi | 6-7,4-6 |
| ITF - M15 - Monastir | 2021/05/11 10:35 | Benjamin Lock v Bruno Nhavene | 6-3,6-2 |
| ITF - M15 - Monastir | 2021/05/06 10:45 | Gustavo Heide v Benjamin Lock | 6-1,7-5 |
| ITF - M15 - Monastir | 2021/05/05 08:30 | Yuta Kawahashi v Benjamin Lock | 3-6,6-2,4-6 |
| Challenger Salinas 2 | 2021/04/27 14:30 | Facundo Diaz Acosta v Benjamin Lock | 6-1,6-2 |
| Challenger Salinas 2 | 2021/04/26 14:30 | Jorge Panta v Benjamin Lock | 4-6,6-7 |
| Challenger - Salinas | 2021/04/18 18:00 | Mathieu Perchicot v Benjamin Lock | 6-4,0-6,6-4 |