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 Poznan | 2021/07/27 16:25 | Elmar Ejupovic v David Poljak | 6-2,6-4 |
| Challenger Poznan | 2021/07/26 11:35 | David Poljak v Lucas Gerch | 7-5,1-6,6-4 |
| Challenger Poznan | 2021/07/25 13:25 | Thomaz Bellucci v David Poljak | 6-4,3-6,1-6 |
| ITF M25 Kottingbrunn | 2021/07/22 08:00 | Mate Valkusz v David Poljak | 6-7,7-5,7-5 |
| ITF M25 Kottingbrunn | 2021/07/20 12:10 | Niklas Waldner v David Poljak | 7-6,2-6,6-7 |
| Challenger Iasi | 2021/07/13 12:15 | Zdenek Kolar v David Poljak | 6-2,7-5 |
| Challenger Iasi | 2021/07/12 08:00 | Vlad Andrei Dancu v David Poljak | 2-6,0-6 |
| Challenger Iasi | 2021/07/11 09:20 | Mircea-Alexandru Jecan v David Poljak | 4-6,0-6 |
| 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 |
| ITF M15 Antalya | 2021/06/24 07:00 | Mircea-Alexandru Jecan v Lorenzo Joaquin Rodriguez | 2-6,2-6 |
| ITF M15 Antalya | 2021/06/23 13:40 | Mircea-Alexandru Jecan v Vladimir Korolev | 6-2,6-2 |
| ITF M15 Antalya | 2021/06/14 07:30 | Mircea-Alexandru Jecan v Francisco Llanes | 2-6,6-7 |
| ITF M15 Antalya | 2021/06/13 07:30 | Mircea-Alexandru Jecan v Franco Roncadelli | 6-4,6-2 |