Stadium: Court 3 Round: 19 Ground: Hardcourt indoor
| 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 Budapest | 2021/10/01 10:00 | Martin Krumich v Mate Valkusz | 2-6,1-6 |
| ITF M25 Budapest | 2021/09/30 11:35 | Gergely Madarasz v Martin Krumich | 4-6,6-4,6-7 |
| Challenger Bratislava | 2021/11/07 09:30 | Danylo Kalenichenko v Uladzimir Ignatik | 7-6,6-4 |
| ITF M25 Prague | 2021/10/07 09:20 | Danylo Kalenichenko v Uladzimir Ignatik | 3-6,6-3,3-6 |
| ITF M25 Prague | 2021/10/05 11:05 | Danylo Kalenichenko v Daniel Paty | 6-4,6-1 |
| Challenger Istanbul | 2021/09/12 09:20 | Nick Chappell v Danylo Kalenichenko | 7-6,6-4 |
| Challenger Kyiv | 2021/09/06 08:00 | Danylo Kalenichenko v Ivan Gakhov | 4-6,2-6 |
| Challenger Kyiv | 2021/09/05 09:25 | Otto Virtanen v Danylo Kalenichenko | 6-3,2-6,4-6 |
| ITF M15 Bratislava | 2021/08/29 08:00 | Mate Valkusz v Danylo Kalenichenko | 6-0,6-2 |
| ITF M15 Bratislava | 2021/08/28 09:00 | Pavel Nejedly v Danylo Kalenichenko | 4-6,2-6 |