| Koszalin, Singles Qualifying M-ITF-POL-02A | 2019/08/09 08:00 | Dembek, Michal v Daniel Michalski | 6-2,6-4 |
| ITF M15 Wroclaw | 2019/07/04 08:00 | Dembek, Michal v Daniel Michalski | 6-4,3-6,6-3 |
| Sopot, Pologne | 2018/07/30 12:30 | Daniel Michalski v Dembek, Michal | 6-2,6-4 |
| ITF Poland F1 | 2018/05/02 08:00 | Dembek, Michal v Daniel Michalski | 6-2,3-6,7-5 |
| Marbello Cup Exhibition Series | 2020/06/03 07:00 | Daniel Michalski v Terczynski, Mateusz | 6-0,3-6,10-6 |
| Marbello Cup Exhibition Series | 2020/06/02 13:30 | Daniel Michalski v Zielinski, Jan | 6-0,5-7,8-10 |
| Marbello Cup Exhibition Series | 2020/06/02 09:10 | Daniel Michalski v Kolasinski, Filip | 2-6,6-7 |
| Bergamo, Italy | 2020/02/20 10:00 | Crepatte, Baptiste v Daniel Michalski | 2-6,6-4,6-3 |
| Bergamo, Italy | 2020/02/18 09:00 | Daniel Michalski v Francesco Maestrelli | 6-2,4-6,6-2 |
| ITF - M15 Antalya | 2020/02/15 08:20 | Cengiz, Baran v Daniel Michalski | 7-5,7-5 |
| ITF - M15 Antalya | 2020/02/06 07:00 | Giovanni Fonio v Daniel Michalski | 4-6,6-4,6-3 |
| ITF - M15 Antalya | 2020/02/05 07:00 | Strom, Gustaf v Daniel Michalski | 6-7,0-6 |
| Marbello Cup Exhibition Series | 2020/06/03 08:50 | Zielinski, Jan v Dembek, Michal | 7-6,5-7,10-4 |
| Marbello Cup Exhibition Series | 2020/06/02 17:15 | Dembek, Michal v Kolasinski, Filip | 4-6,6-2,10-7 |
| Marbello Cup Exhibition Series | 2020/06/02 11:15 | Maciej Rajski v Dembek, Michal | 6-3,3-6,17-15 |
| ITF M15 Loule | 2020/03/10 11:35 | Turchetti, Nicolo v Dembek, Michal | 6-4,4-6,6-4 |
| ITF M15 Faro | 2020/03/04 10:00 | Mertens, Yannick v Dembek, Michal | 6-2,7-5 |
| ITF - M15 Héraklion | 2020/02/12 09:30 | Dembek, Michal v Petros Tsitsipas | 7-5,2-6,6-7 |
| ITF - M15 Antalya | 2019/12/17 07:00 | Dembek, Michal v Nedelko, Ivan | 7-6,5-7,2-6 |
| Antalya, Qualifications Simples M-ITF-TUR-33A | 2019/12/09 07:00 | Dembek, Michal v Igor Saveljic | 1-6,6-7 |