Stadium: Center Court Round: 19 Ground: Clay
| Challenger Prostejov | 2021/06/13 11:10 | Alexander Erler v Jakub Mensik | 6-3,6-4 |
| ITF M25 Most | 2021/05/27 07:55 | Alexander Erler v Franco Agamenone | 4-6,0-6 |
| ITF M25 Most | 2021/05/25 09:35 | Alexander Erler v Jean Thirouin | 7-5,7-6 |
| ITF M15 Antalya | 2021/05/16 07:30 | Alexander Erler v Nick Hardt | 0-6,6-7 |
| ITF M15 Antalya | 2021/05/15 07:30 | Orlando Luz v Alexander Erler | 6-4,6-7,2-6 |
| ITF M15 Antalya | 2021/05/14 09:50 | Alexander Erler v Timofey Skatov | 4-6,6-2,6-1 |
| ITF M15 Antalya | 2021/05/13 11:40 | Alexander Erler v Vladimir Ivanov | 5-7,6-3,6-1 |
| ITF M15 Antalya | 2021/05/12 11:35 | Alexander Erler v Antonio Massara | 6-3,6-2 |
| ITF M25 Most | 2021/05/27 07:55 | Pavel Nejedly v Dalibor Svrcina | 2-6,1-6 |
| ITF M25 Most | 2021/05/26 08:00 | Filip Duda v Pavel Nejedly | 4-6,2-6 |
| ITF M25 Prague | 2021/05/11 08:00 | Pavel Nejedly v Patrik Rikl | 2-6,2-6 |
| ITF M25 Prague | 2021/05/10 08:00 | Pavel Nejedly v Jiri Jenicek | 6-1,6-1 |
| ITF M25 Prague | 2021/05/09 07:30 | Pavel Nejedly v Piotr Matuszewski | 7-5,6-4 |
| ITF M15 Opatija | 2021/03/26 09:00 | Corentin Denolly v Pavel Nejedly | 6-3,2-6,6-1 |
| ITF M15 Opatija | 2021/03/25 10:55 | Martin Damm v Pavel Nejedly | 3-6,5-7 |
| ITF M15 Opatija | 2021/03/24 12:45 | Matic Spec v Pavel Nejedly | 6-1,5-7,3-6 |