Stadium: Court 6 Round: 26 Ground: Hardcourt indoor
| Kazakhstan F2, Singles | 2016/01/30 06:00 | Betov, Sergey v Kalovelonis, Markos | 6-3,6-4 |
| Kazan, Simples M-ITF-RUS-02A | 2019/01/23 10:10 | Betov, Sergey v Ivanov, Vladimir | 6-3,6-0 |
| ITF Finland F4 | 2018/11/13 14:15 | Betov, Sergey v Pauwels, Maxime | 4-6,4-6 |
| ITF Estonia F3 | 2018/11/09 14:00 | Manafov, Vladyslav v Betov, Sergey | 6-2,6-2 |
| ITF Estonia F3 | 2018/11/08 12:05 | Alexander Vasilenko v Betov, Sergey | 2-6,2-6 |
| ITF Estonia F3 | 2018/11/07 13:25 | Remy Bertola v Betov, Sergey | 3-6,7-6,6-7 |
| ITF Estonia F3 | 2018/11/05 09:00 | Khomentovskiy, Matvey v Betov, Sergey | 4-6,2-6 |
| Shenzhen II, Chine | 2018/10/27 04:35 | Xia, Haitong v Betov, Sergey | 7-6,5-7,6-1 |
| Liuzhou, Chine | 2018/10/20 03:50 | Betov, Sergey v Emil Ruusuvuori | 2-6,3-6 |
| Kazan, Simples M-ITF-RUS-02A | 2019/01/22 13:45 | Kalovelonis, Markos v Bolotov, Sergey | 6-2,3-6,6-1 |
| ITF Turkey F41 | 2018/12/21 08:45 | Kalovelonis, Markos v Oriol Roca Batalla | 1-6,4-6 |
| ITF Turkey F41 | 2018/12/21 06:00 | Kalovelonis, Markos v Manole, Alexandru Vasile | 6-3,6-3 |
| ITF Turkey F41 | 2018/12/20 10:20 | Kalovelonis, Markos v Abdel-Aziz, Mohamed | 7-5,6-1 |
| ITF Turkey F41 | 2018/12/19 10:30 | Kalovelonis, Markos v Abdel-Aziz, Mohamed | 7-5,5-1 |
| ITF Greece F8 | 2018/11/16 08:00 | Pervolarakis, Michail v Kalovelonis, Markos | 6-4,6-3 |
| ITF Greece F8 | 2018/11/15 08:00 | Ibrahim, Hasan v Kalovelonis, Markos | 6-7,2-6 |
| ITF Greece F8 | 2018/11/13 09:00 | Pedro Vives Marcos v Kalovelonis, Markos | 2-6,7-6,4-6 |