Stadium: Court 9 Round: 24 Ground: Grass
| WTA Birmingham WD | 2021/06/19 16:15 | Hsieh/Mertens v Jabeur/Perez | 6-3,5-7,3-10 |
| WTA Birmingham WD | 2021/06/18 15:15 | Hsieh/Mertens v Bains/Martincova | 6-2,6-4 |
| WTA Birmingham WD | 2021/06/16 16:00 | Hsieh/Mertens v Stosur/Vandeweghe | 6-4,6-4 |
| 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 15:30 | Hsieh/Mertens v Anisimova/Potapova | 6-2,6-2 |
| French Open Women WD | 2021/06/02 11:00 | Hsieh/Mertens v Jacquemot/Lechemia | 6-2,6-3 |
| WTA Rome WD | 2021/05/13 08:00 | Hsieh/Mertens v Fichman/Olmos | 6-1,4-6,4-10 |
| WTA Madrid WD | 2021/05/03 12:00 | Hsieh/Mertens v Ostapenko/Pavlyuchenkova | 6-7,6-4,9-11 |