Russia: M15 St. Petersburg 4 - Doubles - Main |
| Final | Tajima N./Zakharov A. | Cozbinov A./Freund S. | 1:2 (65:7, 6:2, 6:10) | dettagli | 17.04.2021 |
| Semi-finals | Paul J./Steinegger Y. | Cozbinov A./Freund S. | 1:2 (6:4, 3:6, 9:11) | dettagli | 16.04.2021 |
| Quarter-finals | Deviatiarov M./Igoshin A. | Cozbinov A./Freund S. | 1:2 (2:6, 6:3, 6:10) | dettagli | 15.04.2021 |
| 1/8-finals | Shchaya-Zubrov P./Sheyngezikht L. | Cozbinov A./Freund S. | 0:2 (63:7, 2:6) | dettagli | 13.04.2021 |
Russia: M15 St. Petersburg 3 - Doubles - Main |
| Final | Cozbinov A./Freund S. | Tajima N./Zakharov A. | 2:0 (6:4, 7:5) | dettagli | 10.04.2021 |
| Semi-finals | Paul J./Steinegger Y. | Cozbinov A./Freund S. | 0:2 (65:7, 2:6) | dettagli | 09.04.2021 |
| Quarter-finals | Cozbinov A./Freund S. | Dubrivnyy A./Pokotilov B. | 2:0 (7:67, 6:4) | dettagli | 08.04.2021 |
| 1/8-finals | Cozbinov A./Freund S. | Davydov I./Kiyamov T. | 2:0 (6:3, 7:5) | dettagli | 06.04.2021 |