| ITF Egypt F33 | 02/12 09:50 | - | Bjelica, Ivan v Kalovelonis, Markos | 6-2,6-3 | |
| ITF Egypt F33 | 02/11 11:20 | - | Kalovelonis, Markos v Ziganshin, Robert | 6-1,6-2 | |
| ITF Egypt F33 | 02/09 09:50 | - | Kalovelonis, Markos v Michael, Moses | 7-5,6-3 | |
| ITF Egypt F4 | 02/04 09:45 | - | Trusendi, Walter v Kalovelonis, Markos | 6-0,6-1 | |
| ITF USA F2 Qual | 01/04 18:00 | - | Kalovelonis, Markos v Digiulio, Joseph | 7-6,2-6,6-4 | |
| ITF Greece F9 Qual | 11/13 07:30 | - | Kalovelonis, Markos v Jankovic, Miki | 5-7,4-6 | |
| ITF Greece F10 Qual | 10/25 07:00 | - | Kalovelonis, Markos v Gohlke, Delf | 4-6,6-0,6-3 | |
| ITF Greece F8 | 10/15 08:55 | - | Matic, Nico v Kalovelonis, Markos | 7-6,7-6 | |
| ITF Turkey F33 | 09/24 11:00 | - | Benjamin Bonzi v Kalovelonis, Markos | 6-1,6-0 | |
| ITF Kazakhstan F8 | 08/05 05:30 | - | Kalovelonis, Markos v Karen Khachanov | 3-6,4-6 | |
| ITF Kazakhstan F8 | 07/30 10:30 | - | Kalovelonis, Markos v Vasilevski, Andrei | 6-7,1-6 | |
| ITF Kazakhstan F8 | 07/29 07:00 | - | Daniel Cukierman v Kalovelonis, Markos | 2-6,2-6 | |
| ITF Turkey F23 | 07/03 08:00 | - | Gaspar Murta, Andre v Kalovelonis, Markos | 7-5,6-4 | |
| ITF Turkey F23 | 07/01 08:00 | - | Simon, Tobias v Kalovelonis, Markos | 4-6,6-7 | |
| ITF Turkey F22 | 06/26 08:00 | - | Aldin Setkic v Kalovelonis, Markos | 6-3,6-3 | |
| ITF Turkey F22 | 06/24 08:00 | - | Polkinghorne, Darren v Kalovelonis, Markos | 6-7,3-6 | |
| ITF Turkey F21 | 06/19 10:00 | - | Kalovelonis, Markos v Propoggia, Dane | 3-6,1-6 | |
| ITF Egypt F20 | 06/04 15:25 | - | Kalovelonis, Markos v Giner, Marc | 4-6,6-3,6-7 | |
| Coupe Davis | 04/04 10:00 | 1 | Kalovelonis, Markos v Grigor Dimitrov | 3-6,3-6,0-6 | |
| ITF Greece F3 | 03/25 09:30 | - | Zaitcev, Anton v Kalovelonis, Markos | 3-6,6-4,6-3 |