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 |
| German Premier League | 2020/08/21 13:10 | Ergi Kirkin v Max Wiskandt | 0-6,7-6,6-4 |
| German Premier League | 2020/08/20 08:15 | Ronald Slobodchikov v Ergi Kirkin | 7-6,7-5 |
| German Premier League | 2020/08/19 12:25 | Ergi Kirkin v Buvaysar Gadamauri | 1-6,6-4,6-0 |
| German Premier League | 2020/08/18 11:50 | Ergi Kirkin v Mircea-Alexandru Jecan | 2-6,6-3,6-7 |
| German Premier League | 2020/08/17 17:30 | Ergi Kirkin v Quentin Folliot | 1-6,3-6 |
| German Premier League | 2020/08/15 15:00 | Ergi Kirkin v Sebastian Gima | 6-3,6-1 |
| Majstrovstvá Východnej Európy | 2020/07/22 12:00 | Alexandar Lazarov v Ergi Kirkin | 6-3,0-6,6-1 |
| Majstrovstvá Východnej Európy | 2020/07/21 19:20 | Damir Dzumhur v Ergi Kirkin | 6-3,6-2 |
| ITF - M25 Praha | 2020/09/15 07:50 | David Poljak v Miljan Zekic | 4-6,3-6 |
| ITF - M25 Praha | 2020/09/14 10:30 | David Poljak v Martin Krumich | 7-5,7-6 |
| ITF - M25 Praha | 2020/09/13 10:30 | David Poljak v Dominik Recek | 6-4,6-4 |
| Challenger - Ostrava | 2020/08/29 13:40 | David Poljak v Borna Gojo | 6-4,6-7,2-6 |
| 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 |