| German Championship Women | 2020/12/10 12:00 | Nastasja Schunk v Anna Klasen | 6-2,6-1 |
| German Masters Women | 2020/08/28 07:35 | Romy Koelzer v Anna Klasen | 7-6,7-6 |
| German Premier League Women | 2020/08/27 06:30 | Elena-Teodora Cadar v Anna Klasen | 2-6,1-6 |
| German Premier League Women | 2020/08/26 06:30 | Yana Morderger v Anna Klasen | 2-6,2-6 |
| German Premier League Women | 2020/08/25 06:30 | Lisa Matviyenko v Anna Klasen | 3-6,0-6 |
| German Premier League Women | 2020/08/24 08:00 | Ganna Poznikhirenko v Anna Klasen | 3-6,1-6 |
| German Premier League Women | 2020/08/21 15:25 | Elena-Teodora Cadar v Anna Klasen | 1-6,3-6 |
| German Premier League Women | 2020/08/20 14:05 | Anna Klasen v Sophia Intert | 6-2,6-1 |