Stadium: Centre Court Round: 54 Ground: Hardcourt indoor
| ITF - W60 Hamburg | 2023/10/18 11:20 | Anna Gabric v Anna Klasen | 1-6,6-2,6-3 |
| ITF - W60 Hamburg | 2023/10/16 13:50 | Marie Villet v Anna Klasen | 3-6,2-6 |
| ITF - W60 Hamburg | 2023/10/15 12:25 | Karla Bartel v Anna Klasen | 3-6,6-7 |
| ITF - W25 Santa Margherita | 2023/09/25 10:25 | Laura Hietaranta v Anna Klasen | 6-2,6-3 |
| ITF - W60 Vienna | 2023/09/04 09:00 | Chiara Scholl v Anna Klasen | 6-2,6-2 |
| ITF - W40 Oldenzaal | 2023/08/30 16:50 | Merel Hoedt v Anna Klasen | 6-2,6-1 |
| ITF - W40 Oldenzaal | 2023/08/29 07:30 | Marine Partaud v Anna Klasen | 6-4,4-6,4-6 |
| ITF - W40 Oldenzaal | 2023/08/28 08:00 | Emma Van Poppel v Anna Klasen | 2-6,0-6 |