Stadium: Court 1 Round: 25 Ground: Clay
| Challenger Poznan | 2021/07/26 10:00 | Elmar Ejupovic v Christopher Heyman | 7-6,6-2 |
| Challenger Poznan | 2021/07/25 10:50 | Alexey Vatutin v Elmar Ejupovic | 6-4,2-6,3-6 |
| Challenger Salzburg | 2021/07/05 09:30 | Nicolas Jarry v Elmar Ejupovic | 4-6,6-3,6-2 |
| Challenger Salzburg | 2021/07/04 08:00 | Elmar Ejupovic v Lucas Miedler | 7-6,4-6,7-6 |
| ITF M25 Bourg-en-Bresse | 2021/07/01 10:30 | Jakub Paul v Elmar Ejupovic | 7-6,6-2 |
| ITF M25 Bourg-en-Bresse | 2021/06/30 15:25 | Louis Dussin v Elmar Ejupovic | 3-6,2-6 |
| Challenger Milan | 2021/06/20 12:50 | Elmar Ejupovic v Jonas Forejtek | 0-6,6-3,4-6 |
| Challenger Forli | 2021/06/14 09:30 | Lucas Gerch v Elmar Ejupovic | 4-6,6-4,7-6 |
| 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 |