Stadium: Court 1 Round: 62 Ground: Clay
| ITF M15 Gdynia | 2021/08/09 10:30 | Petr Hajek v Simonas Zukauskas | 6-0,6-1 |
| ITF M15 Heraklion | 2021/06/06 07:30 | Petr Hajek v Ioannis Papounidis | 4-6,7-5,6-10 |
| ITF M15 Heraklion | 2021/05/31 06:30 | Petr Hajek v Toby D. Boyer | 4-6,7-6,6-10 |
| ITF M15 Heraklion | 2021/05/30 09:00 | Petr Hajek v Areg Stepanian | 7-5,6-2 |
| ITF M15 Heraklion | 2021/05/23 10:00 | Petr Hajek v Menelaos Efstathiou | 3-6,2-6 |
| ITF M15 Heraklion | 2021/05/17 07:00 | Petr Hajek v Evangelos Kypriotis | 6-4,0-6,8-10 |
| ITF M15 Sibenik | 2021/04/20 09:15 | Petr Hajek v Marino Jakic | 6-4,4-6,1-10 |
| ITF M15 Sibenik | 2021/04/19 10:35 | Petr Hajek v Giulio Colacioppo | 6-0,6-2 |
| ITF M15 Gdynia | 2021/08/09 08:00 | Filip Pieczonka v Sean Hess | 4-6,6-1,10-8 |
| ITF M15 Gdynia | 2021/08/08 08:30 | Dawid Taczala v Filip Pieczonka | 6-7,0-6 |
| ITF M15 Antalya | 2021/06/16 16:05 | Pawel Juszczak v Filip Pieczonka | 6-2,6-4 |
| ITF M25 Bydgoszcz | 2019/08/12 08:00 | Filip Pieczonka v Arvid Nordquist | 0-6,2-6 |
| Challenger Sopot | 2019/07/29 09:00 | Pawel Juszczak v Filip Pieczonka | 6-0,6-2 |