| Marbello Cup Exhibition Series | 2020/06/03 07:00 | Daniel Michalski v Mateusz Terczynski | 6-0,3-6,10-6 |
| ITF M15 - Poprad | 2021/07/05 08:00 | Illya Beloborodko v Mateusz Terczynski | 6-4,6-2 |
| ITF M15 - Poprad | 2021/07/04 11:00 | Jakub Kroslak v Mateusz Terczynski | 6-2,6-7,9-11 |
| ITF M25 - Wroclaw | 2021/06/29 08:00 | Szymon Kielan v Mateusz Terczynski | 6-3,6-2 |
| ITF M25 - Wroclaw | 2021/06/28 11:00 | Mateusz Terczynski v Lukas Palovic | 6-3,6-1 |
| ITF M25 - Wroclaw | 2021/06/27 14:00 | Dominik Langmajer v Mateusz Terczynski | 1-6,3-6 |
| ITF M25 - Poznan | 2020/08/23 11:00 | Nikolas Lahky v Mateusz Terczynski | 6-4,2-6,10-6 |
| Polen - National Tour | 2020/07/16 13:05 | Mateusz Terczynski v Kamil Majchrzak | 1-6,1-6 |
| Polen - National Tour | 2020/07/07 10:30 | Mateusz Terczynski v Maciej Rajski | 0-6,0-6 |
| Challenger - Braunschweig | 2021/07/06 15:50 | Daniel Michalski v Vit Kopriva | 2-6,2-6 |
| Challenger - Braunschweig | 2021/07/05 09:30 | Tim Sandkaulen v Daniel Michalski | 3-6,5-7 |
| Challenger - Braunschweig | 2021/07/04 09:00 | Daniel Michalski v Adrian Andreev | 7-6,7-6 |
| ITF M25 - Wroclaw | 2021/07/01 08:50 | Toby Alex Kodat v Daniel Michalski | 6-7,6-4,6-0 |
| ITF M25 - Wroclaw | 2021/06/30 09:30 | Sandro Szic v Daniel Michalski | 1-6,2-6 |
| Challenger Almaty - Kvalifikation | 2021/06/13 07:40 | Jesper De Jong v Daniel Michalski | 6-2,6-1 |
| Challenger - Almaty | 2021/06/06 04:00 | Daniel Michalski v Corentin Denolly | 6-3,6-7,2-6 |
| ITF M25 - Most | 2021/05/28 08:30 | Daniel Michalski v Alex Rybakov | 4-6,4-6 |