Stadium: Court 5 Round: 14 Ground: Clay
| ITF M15 Telavi | 2019/07/20 06:00 | David Poljak v Yan Bondarevskiy | 7-6,7-5 |
| ITF M15 Vyshkovo | 2021/09/21 07:00 | Yan Bondarevskiy v Tommaso Compagnucci | 2-6,7-6,5-7 |
| ITF M15 Zlatibor | 2021/09/18 11:30 | Fabian Marozsan v Yan Bondarevskiy | 6-4,6-3 |
| ITF M15 Zlatibor | 2021/09/17 10:55 | Yan Bondarevskiy v Zsombor Velcz | 6-4,6-1 |
| ITF M15 Zlatibor | 2021/09/16 09:30 | Yan Bondarevskiy v Luigi Sorrentino | 6-2,6-2 |
| ITF M15 Zlatibor | 2021/09/15 08:00 | Yan Bondarevskiy v Kristof Minarik | 6-1,6-4 |
| Challenger Kyiv | 2021/09/05 09:30 | Vladyslav Orlov v Yan Bondarevskiy | 7-5,6-2 |
| ITF M15 Chornomorsk | 2021/09/04 07:00 | Illya Beloborodko v Yan Bondarevskiy | 3-6,6-4,6-3 |
| ITF M15 Chornomorsk | 2021/09/03 07:00 | Yan Bondarevskiy v Julius Tverijonas | 6-2,6-3 |
| Challenger Bucharest | 2021/09/19 09:45 | David Poljak v Uladzimir Ignatik | 4-6,1-6 |
| Challenger Banja Luka | 2021/09/07 08:00 | David Poljak v Tomas Martin Etcheverry | 2-6,5-7 |
| Challenger Banja Luka | 2021/09/06 11:35 | David Poljak v Mircea-Alexandru Jecan | 6-3,6-4 |
| Challenger Banja Luka | 2021/09/05 12:25 | David Poljak v Moez Echargui | 2-6,6-3,6-2 |
| Challenger Warsaw | 2021/08/22 12:15 | Jonathan Mridha v David Poljak | 2-6,6-4,6-2 |
| ITF M25 Prostejov | 2021/08/17 09:00 | Alex Rybakov v David Poljak | 7-6,7-6 |
| ITF M25 Grodzisk Mazowiecki | 2021/08/08 08:00 | David Poljak v Zsombor Piros | 4-6,6-7 |
| ITF M25 Grodzisk Mazowiecki | 2021/08/07 11:55 | David Poljak v Adam Pavlasek | 4-6,7-6,6-1 |