Stadium: Court 1 Round: 27 Ground: Hardcourt outdoor
| ITF M25 Budapest | 2021/09/29 11:55 | Zsombor Piros v Alessandro Pecci | 6-1,6-3 |
| Austria Bundesliga | 2021/09/12 11:31 | Dennis Novak v Zsombor Piros | 6-4,5-1 |
| ITF M25 Ricany | 2021/09/05 08:30 | Zsombor Piros v Yshai Oliel | 6-3,3-6,6-3 |
| ITF M25 Ricany | 2021/09/03 08:30 | Orlando Luz v Zsombor Piros | 4-6,2-6 |
| ITF M25 Ricany | 2021/09/02 11:05 | Pavel Nejedly v Zsombor Piros | 4-6,2-6 |
| ITF M25 Ricany | 2021/09/01 11:05 | Jonas Forejtek v Zsombor Piros | 4-6,5-7 |
| Challenger Prague | 2021/08/24 08:30 | Zsombor Piros v Uladzimir Ignatik | 4-6,3-6 |
| Challenger Prague | 2021/08/23 08:00 | Oriol Roca Batalla v Zsombor Piros | 3-6,1-6 |
| ITF M25 Budapest | 2021/09/29 07:30 | Filip Duda v Omar Giacalone | 6-1,6-3 |
| ITF M25 Pardubice | 2021/09/21 10:15 | Filip Duda v Dominik Recek | 4-6,2-6 |
| ITF M25 Pardubice | 2021/09/20 09:00 | Filip Duda v Jakub Katuch | 6-1,6-1 |
| UTR Pro Tennis Series Ricany | 2021/09/18 07:30 | Jan Satral v Filip Duda | 6-3,6-7,4-6 |
| UTR Pro Tennis Series Ricany | 2021/09/17 09:00 | Filip Duda v Yurii Dzhavakian | 6-4,5-1 |
| UTR Pro Tennis Series Ricany | 2021/09/15 07:30 | Filip Duda v Martins Podzus | 6-2,6-0 |
| UTR Pro Tennis Series Ricany | 2021/09/14 07:30 | Filip Duda v Dominik Kellovsky | 7-6,6-3 |
| UTR Pro Tennis Series Ricany | 2021/09/13 09:00 | Adam Kozler v Filip Duda | 1-6,3-6 |