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 | 2021/07/26 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 Wroclaw | 2021/06/29 13:25 | Uladzimir Ignatik v David Poljak | 6-0,6-2 |
| 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 |
| ITF M15 Antalya | 2021/06/11 06:55 | Francisco Comesana v Mircea-Alexandru Jecan | 2-6,6-1,6-2 |
| ITF M15 Antalya | 2021/06/10 07:00 | Fermin Tenti v Mircea-Alexandru Jecan | 3-6,6-4,2-6 |
| ITF M15 Antalya | 2021/06/09 07:00 | Buvaysar Gadamauri v Mircea-Alexandru Jecan | 3-6,4-6 |