Stadium: Court 6 Round: 44 Ground: Clay
| ITF M25 Poznan | 2021/08/22 08:00 | Lars Aregger v Michal Mikula | 1-6,0-6 |
| ITF M25 Prostejov | 2021/08/15 08:00 | Lars Aregger v Jakub Kroslak | 2-6,2-6 |
| ITF M25 Grodzisk Mazowiecki | 2021/08/02 11:00 | Lars Aregger v Piotr Galus | 3-6,1-6 |
| ITF M25 Most | 2021/05/24 08:00 | Benedikt Emesz v Lars Aregger | 7-6,6-0 |
| ITF M25 Most | 2021/05/23 08:00 | Lars Aregger v Fred Olivier Schommer | 3-6,6-1,10-8 |
| ITF M15 Lodz | 2021/08/16 08:00 | Kamil Gajewski v Krystof Zapsky | 6-3,6-3 |
| Challenger Prague | 2021/08/08 08:30 | Franco Agamenone v Krystof Zapsky | 6-2,6-3 |
| ITF M25 Wroclaw | 2021/06/27 14:00 | Toby Alex Kodat v Krystof Zapsky | 6-0,6-2 |
| ITF M25 Most | 2021/05/23 14:00 | Krystof Zapsky v Daniel Siniakov | 4-6,3-6 |
| ITF M25 Jablonec Nad Nisou | 2021/05/16 10:00 | Krystof Zapsky v Filip Duda | 6-4,3-6,9-11 |
| ITF M25 Prague | 2021/05/09 11:00 | Krystof Zapsky v Peter Goldsteiner | 3-6,4-6 |
| ITF M15 Monastir | 2019/12/15 08:00 | Mohamed Ali Abibsi v Krystof Zapsky | 3-6,4-6 |
| ITF M15 Monastir | 2019/12/01 10:00 | Krystof Zapsky v Julien De Cuyper | 4-6,3-6 |