Stadium: Court 1 Round: 25 Ground: Hardcourt outdoor
| WTA Columbus | 2021/09/25 15:00 | Saisai Zheng v Nuria Parrizas-Diaz | 7-5,3-6,4-6 |
| WTA Columbus | 2021/09/24 15:00 | Lauren Davis v Saisai Zheng | 6-1,2-6,2-6 |
| WTA Columbus | 2021/09/23 15:00 | Alexa Glatch v Saisai Zheng | 6-4,4-6,3-6 |
| WTA Columbus | 2021/09/21 21:20 | Asia Muhammad v Saisai Zheng | 7-6,3-6,6-7 |
| ITF W60 Caldas da Rainha | 2021/09/19 14:05 | Saisai Zheng v Harmony Tan | 6-4,3-6,6-3 |
| ITF W60 Caldas da Rainha | 2021/09/18 15:00 | Saisai Zheng v Maddison Inglis | 6-2,6-3 |
| ITF W60 Caldas da Rainha | 2021/09/17 10:50 | Saisai Zheng v Marie Benoit | 6-3,6-1 |
| ITF W60 Caldas da Rainha | 2021/09/16 09:00 | Saisai Zheng v Amandine Hesse | 2-6,7-5,7-5 |
| ITF W60 Berkeley | 2021/09/28 18:50 | Ivana Popovic v Maria Kozyreva | 3-6,4-6 |
| ITF W60 Berkeley | 2021/09/27 20:15 | Maria Kozyreva v Charlotte Chavatipon | 7-5,6-2 |
| ITF W15 Monastir | 2021/07/16 08:30 | Tiphanie Lemaitre v Maria Kozyreva | 6-4,1-6,6-3 |
| ITF W15 Monastir | 2021/07/15 08:25 | Dalayna Hewitt v Maria Kozyreva | 6-1,4-6,3-6 |
| ITF W15 Monastir | 2021/07/13 09:30 | Maria Kozyreva v Michika Ozeki | 6-4,6-1 |
| ITF W15 Monastir | 2021/07/04 14:30 | Maria Kozyreva v Solymar Colling | 6-4,3-6,5-10 |
| ITF W15 Monastir | 2021/07/01 10:35 | Giulia Morlet v Maria Kozyreva | 7-5,0-6,6-2 |
| ITF W15 Monastir | 2021/06/30 08:30 | Maria Kozyreva v Noa Liauw A Fong | 6-4,6-2 |