Stadium: Court 2 Round: 26 Ground: Hardcourt outdoor
| ITF Bulgaria F1 | 2018/05/16 08:20 | Kalovelonis, Markos v Zarichanskiy, D. | 6-1,6-3 |
| ITF Uzbekistan F2 | 2018/04/25 09:00 | Kalovelonis, Markos v Zhyrmont, Dzmitry | 5-7,3-6 |
| ITF Uzbekistan F2 | 2018/04/24 14:45 | Shofayziyev, Shonigmatjon v Kalovelonis, Markos | 1-6,5-7 |
| ITF Kazakhstan F4 | 2018/04/18 06:30 | Kalovelonis, Markos v Gabashvili, Teimuraz | 4-6,3-6 |
| ITF Kazakhstan F4 | 2018/04/17 05:50 | Kalovelonis, Markos v Khomentovskiy, Matvey | 7-6,7-6 |
| Coupe Davis | 2018/04/06 10:15 | Celebic, Ljubomir v Kalovelonis, Markos | 6-2,6-1 |
| Coupe Davis | 2018/04/04 09:10 | Podzus, Martins v Kalovelonis, Markos | 3-6,4-6 |
| ITF Greece F5 | 2018/03/28 06:00 | Kalovelonis, Markos v Stergiou, Ioannis | 3-6,2-6 |
| ITF Bulgaria F1 | 2018/05/16 07:00 | Ivanov, Venci v Kirkov, Vasil | 1-6,2-6 |
| ITF Israel F6 | 2018/05/12 07:30 | Matias Franco Descotte v Kirkov, Vasil | 6-4,6-3 |
| ITF Israel F6 | 2018/05/11 07:30 | Elia, Alon v Kirkov, Vasil | 7-5,1-6,3-6 |
| ITF Israel F6 | 2018/05/10 08:25 | Kirkov, Vasil v Bulis, Mor | 6-3,1-6,6-3 |
| ITF Israel F6 | 2018/05/08 11:30 | Kirkov, Vasil v Ovil, Orel | 6-4,6-2 |
| ITF Poland F1 | 2018/05/01 07:30 | Dembek, Michal v Kirkov, Vasil | 6-1,6-0 |
| ITF Poland F1 | 2018/04/30 07:00 | Kirkov, Vasil v Nazaruk, Dominik | 6-4,6-3 |
| ITF USA F10 | 2018/04/12 17:20 | Kirkov, Vasil v Collin Altamirano | 1-6,7-5,2-6 |