Stadium: Court 6 Round: 25 Ground: Clay
| Challenger Prague | 2021/08/25 12:25 | Michael Geerts v Alex Rybakov | 6-2,6-2 |
| Challenger Prague | 2021/08/24 10:15 | Johannes Haerteis v Alex Rybakov | 4-6,2-6 |
| Challenger Prague | 2021/08/23 08:00 | Nick Hardt v Alex Rybakov | 6-7,3-6 |
| Challenger Prague | 2021/08/22 08:00 | Marek Gengel v Alex Rybakov | 5-7,1-6 |
| ITF M25 Prostejov | 2021/08/20 08:00 | Nikolas Sanchez Izquierdo v Alex Rybakov | 6-3,6-2 |
| ITF M25 Prostejov | 2021/08/19 08:15 | Alex Rybakov v Nick Chappell | 6-2,7-6 |
| ITF M25 Prostejov | 2021/08/18 07:55 | Alex Rybakov v Marek Gengel | 6-3,6-3 |
| ITF M25 Prostejov | 2021/08/17 09:00 | Alex Rybakov v David Poljak | 7-6,7-6 |
| ITF M15 Antalya | 2021/06/22 07:00 | Vladimir Korolev v Filip Duda | 6-3,2-6,10-4 |
| ITF M15 Antalya | 2021/06/21 11:35 | Dian Nedev v Filip Duda | 4-6,2-6 |
| ITF M15 Antalya | 2021/06/20 07:00 | Kaya Arinc v Filip Duda | 0-6,4-6 |
| ITF M15 Antalya | 2021/06/15 07:30 | Tadeas Paroulek v Filip Duda | 6-2,6-4 |
| ITF M15 Antalya | 2021/06/14 13:45 | Daiki Yoshimura v Filip Duda | 3-6,6-7 |
| ITF M15 Antalya | 2021/06/13 07:30 | Farzin Danny Amiri v Filip Duda | 6-3,4-6,6-10 |
| ITF M25 Most | 2021/05/26 08:00 | Filip Duda v Pavel Nejedly | 4-6,2-6 |
| ITF M25 Most | 2021/05/25 09:35 | Filip Duda v Stepan Mruzek | 2-6,6-4,10-5 |