Stadium: Center Court Round: 26 Ground: Clay
| WTA Hamburg | 2021/07/07 11:30 | Zaja, Anna v Viktoriya Tomova | 0-6,6-3,7-5 |
| WTA Hamburg | 2021/07/06 08:00 | Zaja, Anna v Gerlach, Katharina | 7-5,3-6,6-4 |
| WTA Hamburg | 2021/07/05 08:00 | Magdalena Frech v Zaja, Anna | 0-0 |
| WTA Hamburg | 2021/07/05 08:00 | Jasmin Jebawy v Zaja, Anna | 2-6,3-6 |
| WTA Bad Homburg | 2021/06/21 11:30 | Zaja, Anna v Ann Li | 0-6,4-6 |
| WTA Bad Homburg | 2021/06/20 09:00 | Zaja, Anna v Julia Middendorf | 6-2,7-5 |
| ITF W25 Jonkoping | 2021/06/16 11:10 | Carol Zhao v Zaja, Anna | 6-4,4-6,6-2 |
| ITF W25 Jonkoping | 2021/06/15 08:10 | Zuger, Joanne v Zaja, Anna | 5-7,4-6 |
| WTA Hamburg | 2021/07/07 09:00 | Elena-Gabriela Ruse v Jil Teichmann | 7-5,7-6 |
| WTA Hamburg | 2021/07/06 08:00 | Elena-Gabriela Ruse v Isabella Shinikova | 6-3,6-3 |
| WTA Hamburg | 2021/07/05 10:35 | Elena-Gabriela Ruse v En Shuo Liang | 6-2,6-1 |
| ITF W60 Montpellier | 2021/07/01 09:00 | Cristina Bucsa v Elena-Gabriela Ruse | 7-6,7-6 |
| ITF W60 Montpellier | 2021/06/30 09:00 | Elena-Gabriela Ruse v Jia-Jing Lu | 6-4,6-2 |
| Wimbledon Women | 2021/06/23 10:00 | Elena-Gabriela Ruse v Simona Waltert | 2-6,2-6 |
| ITF W100 Nottingham | 2021/06/14 15:00 | Cristina Bucsa v Elena-Gabriela Ruse | 1-6,6-2,11-9 |
| ITF W100 Nottingham | 2021/06/13 16:35 | Ranah Akua Stoiber v Elena-Gabriela Ruse | 2-6,1-6 |