Stadium: Stadium 1 Round: 27 Ground: Hardcourt outdoor
| Challenger Lexington - MP | 2021/07/28 20:00 | Doumbia/Reboul v Polansky/Schnur | 6-2,6-7,6-10 |
| Challenger Ostrava - MP | 2021/04/28 14:30 | Balaji/Nedunchezhiyan v Polansky/Schnur | 6-3,6-3 |
| Challenger Tallahassee - MP | 2021/04/20 22:50 | Ebden/Novikov v Polansky/Schnur | 6-3,6-3 |
| Challenger Nur-Sultan – MP | 2021/03/04 08:50 | Polansky/Schnur v Lomakin/Manafov | 6-3,6-2 |
| Challenger Nur-Sultan – MP | 2021/03/03 07:30 | Polansky/Schnur v Fomin/Tashbulatov | 6-2,7-6 |
| Challenger Nur-Sultan – MP | 2021/02/25 11:30 | Istomin/Yevseyev v Polansky/Schnur | 6-0,6-3 |
| Challenger Nur-Sultan – MP | 2021/02/23 13:15 | Skatov/Tashbulatov v Polansky/Schnur | 2-6,1-6 |
| Challenger Potchefstroom – MP | 2021/02/13 12:30 | Polansky/Schnur v Huesler/Kolar | 4-6,6-2,4-10 |
| Challenger Lexington - MP | 2021/07/29 01:05 | Gomez/Tabilo v Draxl/Kozlov | 1-6,5-7 |