Stadium: Stadium 9 Round: 25 Ground: Hardcourt outdoor
| WTA Cincinnati WD | 2021/08/19 22:45 | Mattek-Sands/Swiatek v Krejcikova B / Siniakova K | 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 B / Siniakova K | 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 |
| French Open Women WD | 2021/06/04 11:40 | Friedsam/Wang v Mattek-Sands/Swiatek | 5-7,3-6 |
| WTA Ostrava WD | 2021/09/20 12:00 | Kalashnikova O / Kato M v Lohoff/Panova | 6-1,6-2 |