Stadium: Court 7 Round: 25 Ground: Clay
| ITF M15 Sozopol | 2021/09/16 09:35 | Martin Krumich v Konstantin Zhzhenov | 6-2,6-4 |
| ITF M15 Sozopol | 2021/09/14 09:00 | Martin Krumich v Valentin Vanta | 7-5,7-6 |
| ITF M25 Ricany | 2021/09/02 10:45 | Orlando Luz v Martin Krumich | 6-7,6-1,6-2 |
| ITF M25 Ricany | 2021/09/01 09:20 | Jiri Barnat v Martin Krumich | 2-6,3-6 |
| Challenger Prague | 2021/08/23 11:20 | Michael Geerts v Martin Krumich | 6-2,6-4 |
| ITF M25 Prostejov | 2021/08/18 08:00 | Martin Krumich v Nikolas Sanchez Izquierdo | 0-6,2-6 |
| ITF M25 Prostejov | 2021/08/17 09:15 | Martin Krumich v Daniel Siniakov | 3-6,6-4,7-5 |
| Challenger Prague | 2021/08/09 12:30 | Evan Furness v Martin Krumich | 4-6,6-4,6-3 |
| Challenger Szczecin | 2021/09/13 09:00 | Alexey Vatutin v Maciej Rajski | 5-7,6-3,6-4 |
| Challenger Szczecin | 2021/09/12 10:30 | Maciej Rajski v Rudolf Molleker | 7-5,6-4 |
| ITF M15 Lodz | 2021/08/22 08:30 | Maciej Rajski v Yann Wojcik | 6-3,6-7,6-1 |
| ITF M15 Lodz | 2021/08/21 08:00 | Gilbert S K Junior v Maciej Rajski | 4-6,6-7 |
| ITF M15 Lodz | 2021/08/20 10:00 | Pawel Juszczak v Maciej Rajski | 6-7,3-6 |
| ITF M15 Lodz | 2021/08/19 10:00 | Maciej Rajski v Michal Dembek | 7-6,6-2 |
| ITF M25 Grodzisk Mazowiecki | 2021/08/05 14:40 | Facundo Diaz Acosta v Maciej Rajski | 6-4,1-6,4-6 |
| ITF M25 Grodzisk Mazowiecki | 2021/08/04 16:45 | Vojtech Vlkovsky v Maciej Rajski | 0-6,3-6 |