Round: 27 Ground: Hardcourt outdoor
| WTA Chicago WD | 2021/09/29 19:45 | Hsieh/Mertens v Golubic/Teichmann | 6-4,3-6,10-6 |
| US Open Women WD | 2021/09/08 20:05 | Hsieh/Mertens v Gauff/McNally | 3-6,6-7 |
| US Open Women WD | 2021/09/06 19:05 | Hsieh/Mertens v Minnen/Van Uytvanck | 6-0,6-2 |
| US Open Women WD | 2021/09/04 20:45 | Hsieh/Mertens v Eikeri/Lechemia | 6-4,6-2 |
| US Open Women WD | 2021/09/02 20:05 | Hsieh/Mertens v Kalinskaya/Putintseva | 6-0,6-0 |
| WTA Cincinnati WD | 2021/08/18 17:00 | Hsieh/Mertens v Blinkova/Sasnovich | 5-7,7-5,5-10 |
| Wimbledon Women WD | 2021/07/10 15:10 | Kudermetova/Vesnina v Hsieh/Mertens | 6-3,5-7,7-9 |
| Wimbledon Women WD | 2021/07/09 12:00 | Hsieh/Mertens v Aoyama/Shibahara | 6-4,1-6,6-3 |
| WTA Chicago WD | 2021/09/30 20:35 | Kichenok/Olaru v Melichar/Schuurs | 6-4,5-7,3-10 |
| WTA Chicago WD | 2021/09/27 20:25 | Bektas/Moore v Melichar/Schuurs | 6-7,3-6 |
| US Open Women WD | 2021/09/02 17:20 | Melichar/Schuurs v Rodionova/Rodionova | 2-6,4-6 |
| WTA Chicago WD | 2021/08/25 20:20 | Melichar/Schuurs v Martincova/Vondrousova | 6-1,4-6,9-11 |
| WTA Chicago WD | 2021/08/24 16:00 | Melichar/Schuurs v Christian/Hibino | 6-2,7-6 |
| WTA Cincinnati WD | 2021/08/20 20:00 | Melichar/Schuurs v Stosur/Zhang | 3-6,7-6,4-10 |
| WTA Cincinnati WD | 2021/08/20 01:45 | Melichar/Schuurs v Kudermetova/Rybakina | 6-4,6-4 |
| WTA Montreal WD | 2021/08/10 22:35 | Melichar/Schuurs v Eikeri/Harrison | 3-6,6-2,4-10 |