Stadium: Court 4 Round: 19 Ground: Clay
| Challenger Iasi | 2021/07/11 09:20 | Mircea-Alexandru Jecan v David Poljak | 4-6,0-6 |
| Challenger Banja Luka | 2021/09/05 12:25 | David Poljak v Moez Echargui | 2-6,6-3,6-2 |
| Challenger Warsaw | 2021/08/22 12:15 | Jonathan Mridha v David Poljak | 2-6,6-4,6-2 |
| ITF M25 Prostejov | 2021/08/17 09:00 | Alex Rybakov v David Poljak | 7-6,7-6 |
| ITF M25 Grodzisk Mazowiecki | 2021/08/08 08:00 | David Poljak v Zsombor Piros | 4-6,6-7 |
| ITF M25 Grodzisk Mazowiecki | 2021/08/07 11:55 | David Poljak v Adam Pavlasek | 4-6,7-6,6-1 |
| ITF M25 Grodzisk Mazowiecki | 2021/08/07 07:25 | David Poljak v Michal Dembek | 6-3,3-6,6-3 |
| ITF M25 Grodzisk Mazowiecki | 2021/08/04 17:10 | David Poljak v Szymon Kielan | 7-5,6-3 |
| Challenger Poznan | 2021/07/27 16:25 | Elmar Ejupovic v David Poljak | 6-2,6-4 |
| Challenger Banja Luka | 2021/09/05 10:50 | Vasil Kirkov v Mircea-Alexandru Jecan | 4-6,4-6 |
| ITF M25 Bacau | 2021/08/18 12:00 | Mircea-Alexandru Jecan v Dan Alexandru Tomescu | 6-7,1-6 |
| ITF M15 Curtea de Arges | 2021/08/10 12:20 | Boris Pokotilov v Mircea-Alexandru Jecan | 3-6,6-4,6-1 |
| ITF M25 Pitesti | 2021/08/05 11:25 | Marko Tepavac v Mircea-Alexandru Jecan | 6-3,7-6 |
| ITF M25 Pitesti | 2021/08/04 08:00 | Mircea-Alexandru Jecan v Ray Ho | 6-2,6-2 |
| ITF M15 Novi Sad | 2021/07/29 07:25 | Mariano Navone v Mircea-Alexandru Jecan | 6-3,6-2 |
| ITF M15 Novi Sad | 2021/07/27 12:35 | Aziz Ouakaa v Mircea-Alexandru Jecan | 4-6,1-6 |
| Challenger Iasi | 2021/07/11 09:20 | Mircea-Alexandru Jecan v David Poljak | 4-6,0-6 |