USA: US Open - Doubles - Main |
| 1/32-finals | Niculescu M./Ruse G. | Hercog P./Sevastova A. | 2:1 (6:1, 5:7, 7:5) | details | 02.09.2021 |
Canada: Montreal - Doubles - Main |
| 1/16-finals | Bektas E./Moore T. | Hercog P./Van Uytvanck A. | 2:1 (6:3, 5:7, 10:7) | details | 09.08.2021 |
United Kingdom: Birmingham - Doubles - Main |
| 1/8-finals | Moore T./Silva E. | Hercog P./Riske A. | 2:1 (0:6, 6:1, 10:6) | details | 14.06.2021 |
France: French Open - Doubles - Main |
| 1/16-finals | Doi M./Hercog P. | Chan H-C./Chan L. | 0:0 RET. (2:5) | details | 05.06.2021 |
| 1/32-finals | Doi M./Hercog P. | Pattinama Kerkhove L./Van der Hoek R. | 2:0 (7:63, 6:4) | details | 03.06.2021 |