Stadium: Stadium 8 Round: 25 Ground: Hardcourt outdoor
| WTA - Chicago - DD | 2021/09/30 14:00 | Ninomiya/Santamaria v Aoyama/Shibahara | 1-6,3-6 |
| WTA - Chicago - DD | 2021/09/29 15:00 | Ninomiya/Santamaria v Neel/Rodionova | 6-3,6-4 |
| Australian Open - Dames - DD | 2021/02/10 06:40 | Kichenok/Ostapenko v Ninomiya/Santamaria | 7-6,6-4 |