Stadium: Court 2 Round: 27 Ground: Hardcourt outdoor
| ITF M15 Heraklion | 2019/11/28 08:00 | Alexandar Lazarov v Marek Gengel | 6-4,6-2 |
| ITF M15 Sharm El Sheikh | 2020/10/15 08:00 | Alexandar Lazarov v Vitaliy Sachko | 7-5,3-6,6-3 |
| ITF M15 Sharm El Sheikh | 2020/10/14 10:45 | Benjamin Lock v Alexandar Lazarov | 2-6,3-6 |
| Challenger Sibiu | 2020/09/20 09:00 | Elmar Ejupovic v Alexandar Lazarov | 6-4,2-6,6-1 |
| Challenger Sibiu | 2020/09/19 11:40 | Alexandar Lazarov v Mircea-Alexandru Jecan | 6-1,6-2 |
| Challenger Iasi | 2020/09/13 08:00 | Alexandar Lazarov v Felipe Meligeni Rodrigues Alves | 4-6,2-6 |
| Challenger Iasi | 2020/09/12 09:00 | Johannes Haerteis v Alexandar Lazarov | 3-6,5-7 |
| Eastern European Championship | 2020/07/22 12:00 | Alexandar Lazarov v Ergi Kirkin | 6-3,0-6,6-1 |
| Eastern European Championship | 2020/07/20 16:55 | Damir Dzumhur v Alexandar Lazarov | 6-1,6-3 |
| ITF M15 Sharm El Sheikh | 2020/10/15 11:25 | Daniele Capecchi v Marek Gengel | 6-7,6-7 |
| ITF M15 Sharm El Sheikh | 2020/10/14 09:30 | Francesco Vilardo v Marek Gengel | 6-7,7-6,2-6 |
| ITF M15 Sharm El Sheikh | 2020/10/07 11:35 | Omni Kumar v Marek Gengel | 6-2,6-4 |
| ITF M25 Prague | 2020/09/13 09:00 | Marek Gengel v Tomas Liska | 3-6,6-3,8-10 |
| Challenger Prague 2 | 2020/08/25 08:30 | Marek Gengel v Botic Van De Zandschulp | 3-6,2-6 |
| Challenger Prague 2 | 2020/08/23 08:30 | Marek Gengel v Teymuraz Gabashvili | 6-2,7-6 |
| Challenger Prague 2 | 2020/08/22 08:30 | Marek Gengel v Martin Krumich | 6-7,6-1,7-6 |
| Challenger Potchefstroom | 2020/03/10 09:15 | Sadio Doumbia v Marek Gengel | 6-4,6-2 |