Stadium: Arantxa Sanchez Stadium Round: 26 Ground: Clay
| WTA Madrid WD | 2021/05/03 10:30 | Kania/Piter v Keys/Pegula | 3-6,3-6 |
| WTA Miami WD | 2021/03/29 00:10 | Gauff/McNally v Krejcikova/Siniakova | 6-7,6-4,10-8 |
| WTA Miami WD | 2021/03/27 17:40 | Bertens/Rus v Krejcikova/Siniakova | 1-6,4-6 |
| WTA Dubai WD | 2021/03/11 13:15 | Babos/Kudermetova v Krejcikova/Siniakova | 6-3,7-5 |
| WTA Dubai WD | 2021/03/10 11:30 | Kichenok/Olaru v Krejcikova/Siniakova | 7-5,4-6,6-10 |
| WTA Doha WD | 2021/03/04 13:15 | Krejcikova/Siniakova v Niculescu/Ostapenko | 6-2,3-6,8-10 |
| WTA Doha WD | 2021/03/03 11:30 | Krejcikova/Siniakova v Bertens/Kerkhove | 4-6,6-4,13-11 |
| WTA Doha WD | 2021/03/01 14:00 | Krejcikova/Siniakova v Zheng/Zhu | 5-7,6-3,10-3 |
| Australian Open Women WD | 2021/02/19 05:00 | Krejcikova/Siniakova v Mertens/Sabalenka | 2-6,3-6 |