Stadium: Stadium 4 Round: 26 Ground: Hardcourt outdoor
| French Open Women WD | 2021/06/06 10:30 | Hsieh/Mertens v Mattek-Sands/Swiatek | 7-5,4-6,5-7 |
| WTA Indian Wells WD | 2021/10/07 19:55 | Mattek-Sands/Swiatek v Lohoff/Panova | 6-1,6-3 |
| WTA Cincinnati WD | 2021/08/19 22:45 | Mattek-Sands/Swiatek v Krejcikova/Siniakova | 4-6,3-6 |
| WTA Cincinnati WD | 2021/08/19 02:00 | Jurak/Klepac v Mattek-Sands/Swiatek | 6-4,1-6,3-10 |
| WTA Cincinnati WD | 2021/08/18 00:55 | Mattek-Sands/Swiatek v Martic/Rogers | 2-6,7-5,10-5 |
| French Open Women WD | 2021/06/13 09:30 | Mattek-Sands/Swiatek v Krejcikova/Siniakova | 4-6,2-6 |
| French Open Women WD | 2021/06/11 12:35 | Mattek-Sands/Swiatek v Begu/Podoroska | 6-3,6-4 |
| French Open Women WD | 2021/06/08 11:35 | Mattek-Sands/Swiatek v Jurak/Klepac | 6-3,6-2 |
| French Open Women WD | 2021/06/06 10:30 | Hsieh/Mertens v Mattek-Sands/Swiatek | 7-5,4-6,5-7 |
| WTA Indian Wells WD | 2021/10/09 01:00 | Anisimova/Yastremska v Hsieh/Mertens | 1-6,1-6 |
| WTA Chicago WD | 2021/09/29 19:45 | Hsieh/Mertens v Golubic/Teichmann | 6-4,3-6,10-6 |
| US Open Women WD | 2021/09/08 20:05 | Hsieh/Mertens v Gauff/McNally | 3-6,6-7 |
| US Open Women WD | 2021/09/06 19:05 | Hsieh/Mertens v Minnen/Van Uytvanck | 6-0,6-2 |
| US Open Women WD | 2021/09/04 20:45 | Hsieh/Mertens v Eikeri/Lechemia | 6-4,6-2 |
| US Open Women WD | 2021/09/02 20:05 | Hsieh/Mertens v Kalinskaya/Putintseva | 6-0,6-0 |
| WTA Cincinnati WD | 2021/08/18 17:00 | Hsieh/Mertens v Blinkova/Sasnovich | 5-7,7-5,5-10 |
| Wimbledon Women WD | 2021/07/10 15:10 | Kudermetova/Vesnina v Hsieh/Mertens | 6-3,5-7,7-9 |