Stadium: Court 1 Round: 25 Ground: Clay
| ITF - Braunschweig W25 | 2019/08/22 09:30 | Anna Klasen v Jessica Pieri | 1-6,6-3,6-0 |
| ITF - Jablonec nad Nisou W25 | 2021/09/17 11:05 | Jessica Pieri v Aneta Kucmova | 6-4,4-6,5-7 |
| ITF - Jablonec nad Nisou W25 | 2021/09/16 10:00 | Jessica Pieri v Alexandra Bozovic | 7-6,7-6 |
| ITF - Jablonec nad Nisou W25 | 2021/09/14 11:25 | Jessica Pieri v Lara Salden | 6-0,6-3 |
| ITF - Montreux W60 | 2021/09/09 15:20 | Francesca Jones v Jessica Pieri | 6-2,4-6,6-1 |
| ITF - Montreux W60 | 2021/09/07 12:35 | Stefania Rubini v Jessica Pieri | 3-6,5-7 |
| ITF - Wiedeń W25 | 2021/09/02 12:10 | Erika Andreeva v Jessica Pieri | 6-3,6-3 |
| ITF - Wiedeń W25 | 2021/08/31 11:30 | Ekaterina Kazionova v Jessica Pieri | 6-3,4-6,3-6 |
| US Open - Kobiety | 2021/08/25 22:00 | Oceane Dodin v Jessica Pieri | 6-1,6-3 |
| ITF - Dijon W15 | 2021/09/15 08:00 | Alina Granwehr v Anna Klasen | 6-2,6-4 |
| ITF - Dijon W15 | 2021/09/14 11:00 | Karen Marthiens v Anna Klasen | 1-6,1-6 |
| ITF - Braunschweig W25 | 2021/08/29 09:00 | Anna Klasen v Nastasja Schunk | 3-6,1-6 |
| ITF - Braunschweig W25 | 2021/08/28 10:10 | Dalila Jakupovic v Anna Klasen | 6-3,0-6,2-6 |
| ITF - Braunschweig W25 | 2021/08/27 16:50 | Anna Klasen v Tayisiya Morderger | 7-6,6-2 |
| ITF - Braunschweig W25 | 2021/08/25 13:00 | Anna Klasen v Tamira Paszek | 6-2,6-3 |
| ITF - Koksijde W25 | 2021/08/10 10:05 | Anna Klasen v Katharina Hobgarski | 6-7,4-6 |
| ITF - Koksijde W25 | 2021/08/09 12:50 | Ekaterina Kazionova v Anna Klasen | 4-6,6-3,5-10 |