Stadium: Court 1 Round: 27 Ground: Hardcourt outdoor
| Challenger Nur-Sultan MD | 2021/07/21 08:30 | Igoshin/Nedelko v Kubler/Santillan | 6-7,5-7 |
| Challenger Vicenza MD | 2018/05/30 11:00 | Matsui/Siljestrom v Kubler/Santillan | 6-1,7-6 |
| Challenger Nur-Sultan MD | 2021/07/15 06:00 | Kotov/Manafov v Golubev/Zakharov | 6-4,6-2 |