| ITF M25 Ricany | 2021/08/29 12:00 | Dominik Langmajer v Martin Machala | 3-6,3-6 |
| ITF M25 Poznan | 2021/08/22 08:00 | Dominik Langmajer v Marcelo Zormann | 4-6,1-6 |
| ITF M15 Lodz | 2021/08/15 11:00 | Omar Brigida v Dominik Langmajer | 6-1,6-4 |
| ITF M15 Gdynia | 2021/08/08 08:00 | Olaf Pieczkowski v Dominik Langmajer | 6-2,6-1 |
| ITF M25 Grodzisk Mazowiecki | 2021/08/01 09:55 | Dominik Langmajer v Yujiro Onuma | 3-6,3-6 |
| ITF M15 Castelo Branco | 2021/07/26 11:00 | Adan Freire Da Silva v Dominik Langmajer | 6-3,6-2 |
| ITF M15 Castelo Branco | 2021/07/25 16:00 | Mark Owen Endler v Dominik Langmajer | 3-6,6-2,5-10 |
| ITF M25 Breslavia | 2021/06/27 14:00 | Dominik Langmajer v Mateusz Terczynski | 1-6,3-6 |
| UTR Pro Tennis Series Sofia | 2021/09/01 08:00 | Alec Adamson v Ivailo Keremedchiev | 4-6,1-5 |
| UTR Pro Tennis Series Sofia | 2021/08/31 08:30 | Alec Adamson v Alexandar Lazarov | 2-6,1-5 |
| UTR Pro Tennis Series Portoroz | 2021/08/22 07:00 | Petar Pjevcevic v Alec Adamson | 6-1,6-1 |
| UTR Pro Tennis Series Portoroz | 2021/08/21 12:00 | Jan Vehovec v Alec Adamson | 0-1 |
| UTR Pro Tennis Series Portoroz | 2021/08/20 09:30 | Alec Adamson v Timur Maulenov | 2-6,3-6 |
| UTR Pro Tennis Series Portoroz | 2021/08/19 10:35 | Alec Adamson v Deni Zmak | 0-6,2-6 |
| UTR Pro Tennis Series Portoroz | 2021/08/18 09:30 | Gal Emersic Potocnik v Alec Adamson | 6-3,7-6 |
| UTR Pro Tennis Series Portoroz | 2021/08/17 08:10 | Denis Parshutin v Alec Adamson | 6-2,6-4 |