Stadium: Court 2 Round: 54 Ground: Hardcourt indoor
| ITF M15 - Bratislava | 2021/08/24 08:00 | Jiri Barnat v Jakub Kroslak | 6-3,7-5 |
| ITF M15 - Ostrava | 2021/11/21 12:00 | Michael Gloeckler v Jakub Kroslak | 2-6,6-4,9-11 |
| ITF M15 - Sharm El Sheikh | 2021/11/15 08:00 | Tsung-Hao Huang v Jakub Kroslak | 6-4,6-2 |
| ITF M15 - Sharm El Sheikh | 2021/11/08 10:30 | Mason Recci v Jakub Kroslak | 7-6,6-1 |
| ITF M15 - Sharm El Sheikh | 2021/11/01 08:00 | Yuichiro Inui v Jakub Kroslak | 6-3,7-6 |
| ITF M15 - Sharm El Sheikh | 2021/10/31 09:30 | Jakub Kroslak v Abdalla Genidy | 6-4,6-4 |
| ITF M15 - Sharm El Sheikh | 2021/10/10 10:30 | Yuttana Charoenphon v Jakub Kroslak | 6-4,6-3 |
| ITF M15 - Sharm El Sheikh | 2021/10/06 08:00 | S D Prajwal Dev v Jakub Kroslak | 6-1,2-6,6-2 |
| ITF M15 - Sharm El Sheikh | 2021/10/05 09:35 | Krittin Koaykul v Jakub Kroslak | 1-6,2-6 |
| ITF M15 - Ostrava | 2021/11/21 13:30 | Dominique Graf v Jiri Barnat | 4-6,6-4,5-10 |
| ITF M15 - Opava | 2021/11/17 12:10 | Jiri Barnat v Filip Duda | 6-3,3-6,2-6 |
| ITF M15 - Opava | 2021/11/15 12:05 | Peter Nad v Jiri Barnat | 2-6,6-7 |
| ITF M15 - Opava | 2021/11/14 14:00 | Martin Benes v Jiri Barnat | 2-6,1-6 |
| ITF M25 - Prag | 2021/10/03 08:00 | Tomas Lanik v Jiri Barnat | 7-6,6-3 |
| UTR Pro Tennis Series Ricany | 2021/09/16 08:30 | Jiri Barnat v Matyas Cerny | 6-7,0-0 |
| UTR Pro Tennis Series Ricany | 2021/09/15 10:30 | Antonin Bolardt v Jiri Barnat | 3-6,6-3,1-6 |
| UTR Pro Tennis Series Ricany | 2021/09/14 15:00 | Dominik Recek v Jiri Barnat | 6-4,5-4 |