Stadium: Centre Court Versmold Round: 25 Ground: Clay
| ITF W60 Versmold | 2021/07/26 15:00 | Anna Klasen v Yana Morderger | 6-7,6-2,10-6 |
| ITF W60 Olomouc | 2021/07/18 08:00 | Amanda Carreras v Anna Klasen | 6-2,6-1 |
| ITF W100 Contrexeville | 2021/07/05 11:00 | Anna Klasen v Margaux Rouvroy | 4-6,3-6 |
| UTR Pro Tennis Series Copenhagen Women | 2021/05/29 12:10 | Sofia Nami Samavati v Anna Klasen | 6-4,6-0 |
| UTR Pro Tennis Series Copenhagen Women | 2021/05/28 11:30 | Lou Adler v Anna Klasen | 4-6,2-6 |
| UTR Pro Tennis Series Copenhagen Women | 2021/05/27 14:10 | Martha-Elisa Stemann v Anna Klasen | 1-6,2-5 |
| UTR Pro Tennis Series Copenhagen Women | 2021/05/26 08:00 | Karoline Laursen v Anna Klasen | 2-6,1-6 |
| UTR Pro Tennis Series Copenhagen Women | 2021/05/24 11:30 | Anna Klasen v Zoe Du P Jensen | 6-2,5-1 |
| ITF W60 Biarritz | 2021/07/14 07:50 | Daniela Seguel v Joanna Garland | 1-6,1-6 |
| ITF W100 Contrexeville | 2021/07/07 14:10 | Daniela Seguel v Anhelina Kalinina | 7-6,2-6,4-6 |
| ITF W60 Montpellier | 2021/06/29 14:15 | Daniela Seguel v Martina Di Giuseppe | 6-4,4-6,0-6 |
| Wimbledon Women | 2021/06/22 16:20 | Daniela Seguel v Lesley Pattinama Kerkhove | 4-6,2-6 |
| French Open Women | 2021/05/24 16:05 | Anna-Lena Friedsam v Daniela Seguel | 6-0,6-3 |
| WTA Belgrade | 2021/05/16 11:50 | Xiyu Wang v Daniela Seguel | 6-3,6-3 |
| WTA Belgrade | 2021/05/15 12:15 | Lara Salden v Daniela Seguel | 5-7,6-7 |
| ITF W25 Prague | 2021/05/08 11:10 | Jule Niemeier v Daniela Seguel | 6-3,6-1 |