Stadium: Court 2 Round: 25 Ground: Hardcourt indoor
| ITF M15 Opava | 2021/11/17 11:10 | Lukas Pokorny v Martin Krumich | 6-4,6-3 |
| Challenger Bratislava | 2021/11/08 09:30 | Martin Krumich v Danylo Kalenichenko | 2-6,2-6 |
| Challenger Bratislava | 2021/11/07 11:30 | Duje Ajdukovic v Martin Krumich | 4-6,4-6 |
| ITF M15 Selva Gardena | 2021/10/26 07:30 | Martin Krumich v Matteo Gigante | 4-6,6-7 |
| ITF M25 Hamburg | 2021/10/22 09:55 | Louis Wessels v Martin Krumich | 4-6,6-2,6-2 |
| ITF M25 Hamburg | 2021/10/21 07:55 | Martin Krumich v Viktor Durasovic | 6-3,6-7,7-6 |
| ITF M25 Hamburg | 2021/10/19 13:30 | Andrew Paulson v Martin Krumich | 6-3,6-7,3-6 |
| ITF M25 Prague | 2021/10/06 12:10 | Martin Krumich v Marek Gengel | 7-5,5-7,4-6 |
| ITF M25 Most | 2021/05/23 14:00 | Kai Lemstra v Vojtech Petr | 6-4,6-4 |
| Challenger Prague | 2021/05/02 14:40 | Vojtech Petr v Sergiy Stakhovsky | 3-6,7-6,5-7 |