Stadium: Butch Buchholz Round: 23 Ground: Hardcourt outdoor
| WTA Tenerife | 2021/10/19 09:30 | Heather Watson v Clara Tauson | 4-6,6-2,6-7 |
| WTA Indian Wells | 2021/10/06 19:50 | Sloane Stephens v Heather Watson | 6-7,7-5,6-1 |
| WTA Portoroz | 2021/09/13 16:35 | Heather Watson v Sorana Cirstea | 1-6,3-6 |
| US Open Women | 2021/08/30 18:50 | Heather Watson v Kaja Juvan | 1-6,4-6 |
| WTA Cincinnati | 2021/08/18 18:00 | Ashleigh Barty v Heather Watson | 6-4,7-6 |
| WTA Cincinnati | 2021/08/16 19:55 | Aliaksandra Sasnovich v Heather Watson | 2-6,6-3,1-6 |
| WTA Cincinnati | 2021/08/15 17:30 | Rebecca Peterson v Heather Watson | 4-6,6-4,3-6 |
| WTA Cincinnati | 2021/08/14 18:15 | Katie Volynets v Heather Watson | 7-5,2-6,2-6 |
| ITF W80 Les Franqueses | 2021/10/28 08:50 | Arantxa Rus v Natalija Stevanovic | 4-6,6-4,4-6 |
| ITF W80 Les Franqueses | 2021/10/27 14:55 | Arantxa Rus v Susan Bandecchi | 6-4,4-6,7-5 |
| WTA Tenerife | 2021/10/22 13:40 | Camila Giorgi v Arantxa Rus | 6-1,6-1 |
| WTA Tenerife | 2021/10/21 16:00 | Greet Minnen v Arantxa Rus | 1-6,2-6 |
| WTA Tenerife | 2021/10/19 12:30 | Arantxa Rus v Viktorija Golubic | 6-3,6-4 |
| WTA Indian Wells | 2021/10/09 01:00 | Petra Kvitova v Arantxa Rus | 6-2,6-2 |
| WTA Indian Wells | 2021/10/07 03:00 | Arantxa Rus v Alycia Parks | 6-0,6-1 |
| ITF W80 Valencia | 2021/09/26 09:30 | Arantxa Rus v Mihaela Buzarnescu | 6-4,7-6 |