Stadium: Court 2 Round: 54 Ground: Clay
| ITF Women Verbier | 2018/06/26 11:05 | Nicole Gadient v Gietz, Lea | 7-5,6-1 |
| Kaltenkirchen, Singles Qualifying W-ITF-GER-07A | 2019/06/11 14:00 | Silich, Alina v Anna Klasen | 6-4,6-3 |
| Obidos, Singles Qualifying W-ITF-POR-01A | 2019/05/06 14:50 | Adler, Lou v Anna Klasen | 6-2,7-5 |
| Obidos, Singles Qualifying W-ITF-POR-01A | 2019/05/06 08:00 | Fonte, Maria Ines v Anna Klasen | 3-6,4-6 |
| ITF W25 Santa Margherita | 2019/04/29 12:00 | Adrienn Nagy v Anna Klasen | 7-6,6-2 |
| Obidos, Singles Qualifying W-ITF-POR-01A | 2019/04/09 14:00 | Gergana Topalova v Anna Klasen | 6-0,6-4 |
| Obidos, Singles Qualifying W-ITF-POR-01A | 2019/04/01 14:00 | Ka, Andrea v Anna Klasen | 6-2,3-6,10-6 |
| ITF Women Petange | 2018/10/28 12:55 | Melanie Klaffner v Anna Klasen | 6-0,6-2 |
| ITF Women Petange | 2018/10/27 08:00 | Julia Victoria Rennert v Anna Klasen | 6-3,3-6,0-6 |