Stadium: Central Hard Court Round: 25 Ground: Hardcourt outdoor
| Burgas, Singles Qualifying M-ITF-BUL-05A | 2019/10/12 07:00 | Lazarov, Alexandar v Nagy, Peter | 7-5,5-7,1-6 |
| Burgas, Singles Qualifying M-ITF-BUL-05A | 2019/10/11 12:30 | Manda, Calin v Lazarov, Alexandar | 7-6,0-6,4-6 |
| Burgas, Singles Qualifying M-ITF-BUL-05A | 2019/10/11 08:00 | Jotovski, Tomislav v Lazarov, Alexandar | 5-7,5-7 |
| Burgas, Singles Qualifying M-ITF-BUL-05A | 2019/10/09 13:45 | Gabriel Donev v Lazarov, Alexandar | 7-5,2-6,5-7 |
| Jounieh, Singles M-ITF-LBN-02A | 2019/10/02 13:00 | Bondarevskiy, Yan v Lazarov, Alexandar | 6-4,7-5 |
| Jounieh, Singles M-ITF-LBN-02A | 2019/09/26 13:00 | Petros Tsitsipas v Lazarov, Alexandar | 5-7,3-6 |
| Jounieh, Singles M-ITF-LBN-02A | 2019/09/25 16:45 | Ibrahim, Hasan v Lazarov, Alexandar | 0-6,1-6 |
| Coupe Davis | 2019/09/13 09:00 | Lloyd Harris v Lazarov, Alexandar | 6-4,6-7,6-3 |
| ITF - M15 Antalya | 2019/10/10 09:05 | Kalovelonis, Markos v Aleksandre Bakshi | 6-4,2-6,3-6 |
| ITF - M15 Antalya | 2019/10/09 07:00 | Alexander Shevchenko v Kalovelonis, Markos | 6-3,6-7,4-6 |
| Jounieh, Singles M-ITF-LBN-02A | 2019/10/02 17:40 | Filip, Vladimir v Kalovelonis, Markos | 4-6,6-4,6-3 |
| Jounieh, Singles M-ITF-LBN-02A | 2019/09/26 14:55 | Kalovelonis, Markos v Moundir, Adam | 0-6,3-6 |
| Jounieh, Singles M-ITF-LBN-02A | 2019/09/25 17:55 | Kalovelonis, Markos v Suntic, Sabit | 7-5,4-6,6-1 |
| Moscow, Singles M-ITF-RUS-04A | 2019/08/20 09:00 | Danilov, Savriyan v Kalovelonis, Markos | 6-4,6-1 |
| Moscow, Singles M-ITF-RUS-04A | 2019/08/13 13:00 | Ratniuk, Maxim v Kalovelonis, Markos | 6-1,7-6 |
| Nonthaburi, Singles M-ITF-THA-01A | 2019/07/30 07:40 | Kalovelonis, Markos v Yu Hsiou Hsu | 3-6,2-6 |