Stadium: Court 5 Round: 64 Ground: Clay
| Challenger Liberec Qual | 2018/07/30 09:00 | Ergi Kirkin v David Poljak | 2-6,6-1,2-6 |
| Eastern European Championship | 2020/07/22 12:00 | Alexandar Lazarov v Ergi Kirkin | 6-3,0-6,6-1 |
| Eastern European Championship | 2020/07/21 19:20 | Damir Dzumhur v Ergi Kirkin | 6-3,6-2 |
| Eastern European Championship | 2020/07/20 18:00 | Borna Coric v Ergi Kirkin | 7-5,4-6,6-1 |
| Eastern European Championship | 2020/07/18 10:00 | Milan Drinic v Ergi Kirkin | 2-6,4-6 |
| Eastern European Championship | 2020/07/17 16:00 | Milan Drinic v Ergi Kirkin | 2-6,4-6 |
| Eastern European Championship | 2020/07/16 12:00 | Ergi Kirkin v Pavle Daljev | 5-7,6-4,6-3 |
| Eastern European Championship | 2020/07/14 12:00 | Ergi Kirkin v Dusan Rajic | 5-7,6-3,6-2 |
| Eastern European Championship | 2020/06/25 12:00 | Tomislav Jotovski v Ergi Kirkin | 1-6,4-6 |
| ITF M15 Sharm El Sheikh | 2020/03/05 09:35 | Oleg Khotkov v David Poljak | 6-4,6-3 |
| ITF M15 Sharm El Sheikh | 2020/03/04 13:05 | Stevan Popovic v David Poljak | 1-6,2-6 |
| ITF M15 Sharm El Sheikh | 2020/03/01 08:00 | Karim-Mohamed Maamoun v David Poljak | 7-5,6-3 |
| ITF M15 Sharm El Sheikh | 2020/02/29 08:00 | David Poljak v Nam Hoang Ly | 6-4,7-5 |
| ITF M15 Sharm El Sheikh | 2020/02/28 07:55 | Oleksii Krutykh v David Poljak | 2-6,7-5,6-7 |
| ITF M15 Sharm El Sheikh | 2020/02/27 09:00 | Ryan Nijboer v David Poljak | 2-6,4-6 |
| ITF M15 Sharm El Sheikh | 2020/02/26 11:45 | Luca Nardi v David Poljak | 4-6,2-6 |
| ITF M15 Sharm El Sheikh | 2020/02/13 08:00 | David Poljak v Simon Yitbarek | 3-6,3-6 |