| ITF Greece F2 | 03/17 11:30 | 27 | [425] Kalovelonis, Markos v Marek Jaloviec [308] | 4-6,6-7 | |
| ITF Greece F2 | 03/17 07:30 | 26 | [425] Kalovelonis, Markos v Hampel, Lenny [469] | 6-1,6-7,6-3 | |
| ITF Greece F2 | 03/16 10:10 | 25 | [362] Konecny, Michal v Kalovelonis, Markos [425] | 4-6,4-6 | |
| ITF Greece F1 | 03/09 14:35 | 26 | Kalovelonis, Markos v Griekspoor, Kevin | 2-6,5-7 | |
| ITF Greece F1 | 03/08 12:40 | 25 | Kalovelonis, Markos v Kapiris, Stamatis | 6-1,6-1 | |
| ITF India F1 | 02/13 04:30 | 25 | Kalovelonis, Markos v Sunish, Dhruv | Retired | |
| Kazakhstan F2, Singles | 01/31 06:35 | 25 | Kalovelonis, Markos v Pavel Kotov | Retired | |
| ITF Kazakhstan F1 | 01/23 08:05 | 25 | Papik, Tomas v Kalovelonis, Markos | 6-1,7-5 | |
| ITF USA F2 | 01/12 00:20 | 25 | Tommy Paul v Kalovelonis, Markos | 6-4,6-2 | |
| ITF USA F1 | 01/04 18:00 | 25 | Kalovelonis, Markos v Aragone, JC | 7-5,3-6,4-6 | |
| ITF Cyprus F3 | 12/03 07:30 | 27 | Kalovelonis, Markos v Alexandre Muller | Retired | |
| ITF Cyprus F3 | 12/02 11:00 | 26 | Kalovelonis, Markos v Tarasevicius, Tadas | 6-2,7-5 | |
| ITF Cyprus F3 | 12/02 06:30 | 25 | Kalovelonis, Markos v Andre Biro | 7-6,2-6,7-6 | |
| ITF Cyprus F2 | 11/26 08:00 | 28 | Alexandre Muller v Kalovelonis, Markos | 3-6,6-1,6-1 | |
| ITF Cyprus F2 | 11/25 09:30 | 27 | Kalovelonis, Markos v Pauffley, Neil | 6-3,7-6 | |
| ITF Cyprus F2 | 11/23 09:05 | 25 | Kalovelonis, Markos v Enrico Dalla Valle | 6-2,4-6,7-6 | |
| ITF Finland F4 | 11/15 12:35 | - | Rosenholm, Patrik v Kalovelonis, Markos | 7-6,4-6,5-1 | |
| ITF Finland F4 | 11/14 23:00 | 25 | Rosenholm, Patrik v Kalovelonis, Markos | 7-6,4-6,6-1 | |
| ITF Greece F9 | 11/11 08:00 | 27 | Gomez-Herrera, Carlos v Kalovelonis, Markos | 6-3,6-4 | |
| ITF Greece F9 | 11/10 08:00 | 26 | Sude, Jakob v Kalovelonis, Markos | 4-6,5-7 | |
| ITF Greece F9 | 11/09 07:30 | 25 | Roncalli, Simone v Kalovelonis, Markos | 4-6,5-7 | |
| ITF Greece F8 | 11/01 08:00 | 25 | Kekercheni, Filipp v Kalovelonis, Markos | 6-4,6-7,6-3 | |
| ITF Greece F7 | 10/25 08:30 | 25 | Kalovelonis, Markos v Sude, Jakob | 6-7,4-6 | |
| Challenger Tashkent Qual | 10/10 05:00 | 54 | Kalovelonis, Markos v Zaitcev, Anton | 6-3,3-6,2-6 | |
| Challenger Tashkent Qual | 10/09 06:00 | 46 | Kalovelonis, Markos v Khabibulin, Timur | 6-3,7-6 | |
| ITF USA F30 | 09/30 18:45 | 27 | Marcos Giron v Kalovelonis, Markos | 7-6,6-3 | |
| ITF USA F30 | 09/29 16:30 | 26 | Santiago Rodriguez Taverna v Kalovelonis, Markos | 4-6,6-2,3-6 | |
| ITF USA F30 | 09/28 16:00 | 25 | Moreno, Federico v Kalovelonis, Markos | 7-6,6-7,6-7 | |
| ITF USA F29 | 09/22 17:00 | 26 | Kalovelonis, Markos v Rodriguez Taverna, Santiago FA | Retired | |
| ITF USA F29 | 09/21 19:05 | 25 | Kalovelonis, Markos v Brymer, Gage | 1-6,7-6,6-3 |