Stadium: Court 2 Round: 28 Ground: Clay
| Challenger Warsaw MD | 2021/08/28 11:30 | Manafov/Matuszewski v Romboli/Zielinski | 7-6,3-6,10-6 |
| Challenger Warsaw MD | 2021/08/27 15:25 | Menendez-Maceiras/Vrbensky v Manafov/Matuszewski | 4-6,6-4,2-10 |
| Challenger Warsaw MD | 2021/08/28 11:05 | Lenz/Verbeek v Arneodo R / Molchanov D | 6-3,7-5 |
| Challenger Warsaw MD | 2021/08/27 16:20 | Lenz/Verbeek v Erler/Miedler | 6-7,6-2,10-5 |
| Challenger Luedenscheid MD | 2021/08/18 16:15 | Molchanov D / Nedovyesov A v Lenz/Verbeek | 6-4,7-5 |