Stadium: Court 4 Round: 27 Ground: Hardcourt outdoor
| French Open Women WD | 2021/06/13 09:30 | Mattek-Sands/Swiatek v Krejcikova B / Siniakova K | 4-6,2-6 |
| 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 |
| French Open Women WD | 2021/06/02 09:00 | Droguet A / Janicijevic S v Mattek-Sands/Swiatek | 0-6,1-6 |
| WTA Cincinnati WD | 2021/08/19 01:15 | Kasatkina D / Kontaveit A v Krejcikova B / Siniakova K | 2-6,1-6 |
| Olympics 2020 - WD | 2021/08/01 06:00 | Krejcikova B / Siniakova K v Bencic B / Golubic V | 7-5,6-1 |
| Olympics 2020 - WD | 2021/07/29 06:00 | Krejcikova B / Siniakova K v Kudermetova/Vesnina | 6-3,3-6,10-6 |
| Olympics 2020 - WD | 2021/07/28 04:00 | Krejcikova B / Siniakova K v Barty A / Sanders S | 3-6,6-4,10-7 |
| Olympics 2020 - WD | 2021/07/27 09:15 | Krejcikova B / Siniakova K v Badosa/Sorribes Tormo | 6-2,5-7,10-5 |
| Olympics 2020 - WD | 2021/07/25 04:40 | Krejcikova B / Siniakova K v Hsieh S-Y / Hsu C-W | 6-2,6-1 |
| Wimbledon Women WD | 2021/07/07 16:55 | Krejcikova B / Siniakova K v Kudermetova/Vesnina | 7-6,4-6,7-9 |
| Wimbledon Women WD | 2021/07/05 16:00 | Krejcikova B / Siniakova K v Kuzmova/Rus | 7-6,6-3 |