Stadium: Court 1 Round: 25 Ground: Hardcourt outdoor
| ITF M25 Falun | 2021/09/27 12:00 | Dembek, Michal v Yusuke Takahashi | 6-7,6-2,3-6 |
| ITF M25 Jonkoping | 2021/09/21 08:55 | Oscar Moraing v Dembek, Michal | 6-4,6-4 |
| ITF M25 Plaisir | 2021/09/16 11:45 | Dembek, Michal v Antoine Bellier | 2-6,6-7 |
| ITF M25 Plaisir | 2021/09/15 10:55 | Ajavon, Liova v Dembek, Michal | 0-6,6-7 |
| ITF M15 Lodz | 2021/08/19 10:00 | Maciej Rajski v Dembek, Michal | 7-6,6-2 |
| ITF M15 Lodz | 2021/08/17 08:00 | Jasza Szajrych v Dembek, Michal | 0-6,6-7 |
| ITF M15 Gdynia | 2021/08/12 10:30 | Daniel Michalski v Dembek, Michal | 7-6,4-6,6-3 |
| ITF M15 Gdynia | 2021/08/11 10:25 | Dembek, Michal v Pawel Safuryn | 6-0,6-1 |
| Alicante, Spain | 2021/10/15 13:55 | Oscar Otte v Denis Yevseyev | 7-6,6-1 |
| Alicante, Spain | 2021/10/13 10:55 | Istomin, Denis v Denis Yevseyev | 5-7,4-6 |
| Alicante, Spain | 2021/10/12 09:55 | Denis Yevseyev v Dmitry Popko | 7-6,6-4 |
| Alicante, Spain | 2021/10/11 10:25 | Denis Yevseyev v Daniel Rincon | 7-5,6-2 |
| Alicante, Spain | 2021/10/10 11:35 | Denis Yevseyev v Raja, Purav | 6-0,6-3 |
| Challenger - Barcelone | 2021/10/04 13:00 | Denis Yevseyev v Nicolas Alvarez Varona | 6-3,2-6,1-6 |
| Challenger - Barcelone | 2021/10/03 09:20 | Denis Yevseyev v Alex M Pujolras | 2-6,6-2,6-1 |
| Astana, Kazakhstan | 2021/09/20 08:20 | Marc Polmans v Denis Yevseyev | 6-4,6-2 |