| ITF Greece F10 | 11/05 07:30 | 26 | Markos Kalovelonis v Matvey Khomentovskiy | 7-6,6-7,1-6 | |
| ITF Greece F10 | 11/03 09:00 | 25 | Markos Kalovelonis v Dominik Suc | 6-3,2-6,7-6 | |
| ITF Greece F9 | 10/31 10:30 | 28 | Steven Diez v Markos Kalovelonis | 6-3,6-7,6-1 | |
| ITF Greece F9 | 10/30 08:00 | 27 | Markos Kalovelonis v Ricardo Rodriguez-Pace | 5-7,7-6,6-4 | |
| ITF Greece F9 | 10/29 07:30 | 26 | Markos Kalovelonis v Filip Dolezel | 7-6,6-4 | |
| ITF Greece F9 | 10/27 11:00 | 25 | Markos Kalovelonis v Petar Conkic | 7-6,6-1 | |
| ITF Greece F8 | 10/21 08:40 | 25 | Markos Kalovelonis v Vaclav Safranek | 6-3,3-6,5-7 | |
| ITF Kazakhstan F6 | 10/15 05:50 | 27 | Dmitry Popko v Markos Kalovelonis | 6-4,6-3 | |
| ITF Kazakhstan F6 | 10/14 04:30 | 26 | Dostanbek Tashbulatov v Markos Kalovelonis | 0-6,1-6 | |
| ITF Kazakhstan F5 | 10/08 04:00 | 27 | Jurabek Karimov v Markos Kalovelonis | 7-5,6-1 | |
| ITF Kazakhstan F5 | 10/05 04:00 | 25 | Shonigmatjon Shofayziyev v Markos Kalovelonis | 1-6,2-6 | |
| ITF India F4 | 09/15 05:00 | 25 | Markos Kalovelonis v Bowen Ouyang | 6-7,0-6 | |
| ITF Egypt F27 | 08/19 14:30 | 25 | Markos Kalovelonis v Milos Sekulic | 2-6,3-6 | |
| ITF Egypt F26 | 08/12 17:15 | 25 | Markos Kalovelonis v Davide Galoppini | 6-7,6-3,3-6 | |
| ITF Turkey F31 | 07/01 07:00 | - | Markos Kalovelonis v Roberto Cid Subervi | 3-6,1-6 | |
| ITF Turkey F31 | 06/29 07:00 | - | Markos Kalovelonis v Victor Ouvrard | 6-4,2-6,6-4 | |
| ITF Turkey F31 | 06/25 07:00 | - | Temur Ismailov v Markos Kalovelonis | 6-4,6-3 | |
| ITF Turkey F31 | 06/23 10:30 | - | Markos Kalovelonis v Durukan Durmus | 6-2,6-2 | |
| ITF Uzbekistan F4 | 06/11 06:50 | - | Denys Molchanov v Markos Kalovelonis | 6-3,7-6 | |
| ITF Uzbekistan F4 | 06/10 07:35 | - | Markos Kalovelonis v Denis Matsukevich | 6-3,6-4 | |
| ITF Uzbekistan F4 | 06/09 06:50 | - | Aleksandr Tsatkin v Markos Kalovelonis | 0-6,2-6 | |
| ITF Greece F4 | 04/17 07:00 | - | Markos Kalovelonis v Arthur Surreaux | 4-6,6-7 | |
| ITF Greece F4 | 04/16 09:15 | - | Daniel Masur v Markos Kalovelonis | 4-6,0-6 | |
| ITF Greece F4 | 04/14 10:55 | - | Markos Kalovelonis v Pawel Cias | 6-4,7-5 | |
| ITF Egypt F13 | 04/08 10:30 | - | Markos Kalovelonis v Tucker Vorster | 3-6,4-6 | |
| ITF Greece F2 Qual | 03/30 06:30 | - | Markos Kalovelonis v Lenny Hampel | 6-2,3-6,3-6 | |
| ITF Greece F2 Qual | 03/29 06:15 | - | Markos Kalovelonis v Toni Neykov | 6-4,6-3 | |
| ITF Egypt F6 | 02/18 09:15 | - | Markos Kalovelonis v Julien Cagnina | 3-6,7-6,7-5 | |
| ITF Egypt F6 | 02/16 11:00 | - | Markos Kalovelonis v Giacomo Miccini | 6-4,6-3 | |
| ITF Egypt F6 | 02/15 10:30 | - | Markos Kalovelonis v Lenny Hampel | 6-3,6-4 |