Stadium: Court 1 Round: 26 Ground: Carpet indoor
| ITF Czech Republic F1 | 2017/05/17 08:30 | David Poljak v Krstev, Ondrej | 6-1,7-5 |
| ITF M15 Opava | 2019/10/30 14:30 | Jiri Barnat v Krstev, Ondrej | 2-6,1-6 |
| Olomouc, Singles M-ITF-CZE-07A | 2019/10/17 09:40 | Krstev, Ondrej v Petr Michnev | 3-6,4-6 |
| Olomouc, Singles M-ITF-CZE-07A | 2019/10/16 12:55 | Andrew Paulson v Krstev, Ondrej | 4-6,1-6 |
| Bad Salzdetfurth, Simples M-ITF-GER-14A | 2019/10/10 09:00 | Krstev, Ondrej v Jan Choinski | 4-6,3-6 |
| Bad Salzdetfurth, Simples M-ITF-GER-14A | 2019/10/09 10:20 | Krstev, Ondrej v Jakub Paul | 6-3,6-2 |
| Tabarka, Singles Qualifying M-ITF-TUN-41A | 2019/09/26 10:35 | Prevosto, Luca v Krstev, Ondrej | 6-1,4-6,3-6 |
| Tabarka, Singles Qualifying M-ITF-TUN-41A | 2019/09/25 11:25 | Krstev, Ondrej v Alberto Bronzetti | 6-3,2-6,6-4 |
| Tabarka, Singles Qualifying M-ITF-TUN-41A | 2019/09/20 10:30 | Marco Miceli v Krstev, Ondrej | 6-3,6-3 |
| ITF M15 Opava | 2019/10/30 13:10 | Vanko, Tomas v David Poljak | 4-6,2-6 |
| Olomouc, Singles M-ITF-CZE-07A | 2019/10/17 10:30 | David Poljak v Stanek, Robin | 5-7,6-3,6-7 |
| Olomouc, Singles M-ITF-CZE-07A | 2019/10/16 11:25 | David Poljak v Recek, Dominik | 6-3,6-1 |
| Tavira, Simples M-ITF-POR-14A | 2019/10/02 10:40 | David Poljak v Struvay, Eduardo | 3-6,2-6 |
| Oliveira De Azemeis, Singles Q M-ITF-POR-15A | 2019/09/27 11:40 | David Poljak v Matteo Martineau | 7-6,1-6,3-6 |
| Oliveira De Azemeis, Singles Q M-ITF-POR-15A | 2019/09/26 11:50 | Robert, Quentin v David Poljak | 3-6,0-6 |
| Istanbul, Turkey | 2019/09/13 09:00 | Botic Van De Zandschulp v David Poljak | 6-3,6-2 |
| Istanbul, Turkey | 2019/09/12 07:00 | David Poljak v Viola, Matteo | 6-7,6-4,6-4 |