Stadium: COURT 1 Round: 27 Ground: Hardcourt outdoor
| WTA St. Petersburg WD | 2021/03/17 18:00 | Vesnina/Zvonareva v Buyukakcay/Frech | 6-2,6-1 |
| WTA St. Petersburg WD | 2021/03/17 11:15 | Gorgodze/Rakhimova v Christian K / Santamaria S | 6-4,5-7,7-10 |
| WTA Dubai WD | 2021/03/07 12:30 | Bertens/Kerkhove v Christian K / Santamaria S | 6-4,5-7,10-5 |
| WTA Lyon WD | 2021/03/03 12:55 | Bouchard/Danilovic v Christian K / Santamaria S | 6-3,6-4 |
| WTA Adelaide WD | 2021/02/26 02:30 | Guarachi A / Krawczyk D v Christian K / Santamaria S | 6-1,6-2 |
| WTA Adelaide WD | 2021/02/25 05:50 | Christian K / Santamaria S v 두안 Y-Y / 정 S | 7-5,6-3 |
| WTA Adelaide WD | 2021/02/24 08:50 | Gadecki/Tomljanovic v Christian K / Santamaria S | 4-6,3-6 |
| WTA Melbourne WD | 2021/02/16 05:40 | Lapko/Sasnovich v Christian K / Santamaria S | 6-4,6-3 |
| WTA Moscow WD | 2018/10/15 09:30 | 주라크 D / 올라루 R v Christian K / Santamaria S | 6-3,6-1 |