Stadium: Court 4 Round: 44 Ground: Clay
| 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 Wroclaw | 2021/06/27 14:00 | Dominik Langmajer v Mateusz Terczynski | 1-6,3-6 |
| ITF M15 Gaiba | 2021/06/07 09:45 | Francesco Vilardo v Dominik Langmajer | 7-5,6-3 |
| ITF M15 Bratislava | 2021/08/16 10:30 | Boris Butulija v Martin Machala | 6-0,6-3 |
| ITF M15 Poprad | 2021/07/06 11:25 | Milos Karol v Martin Machala | 6-3,6-4 |
| ITF M25 Most | 2021/05/23 14:00 | Martin Machala v Dominik Recek | 4-6,0-6 |