Stadium: Clay 1 Round: 54 Ground: Clay
| ITF W80 Les Franqueses | 2021/10/24 07:00 | Natalia Fehr v Anna Klasen | 0-6,3-6 |
| ITF W15 Cancún | 2021/10/04 14:00 | Maria I Yapur Lopez v Natalia Fehr | 3-6,6-3,12-10 |
| ITF W15 Cancún | 2021/09/27 17:30 | Brittany Collens v Natalia Fehr | 6-0,6-0 |
| ITF W15 Cancún | 2021/09/26 17:30 | Sylvia Schenck v Natalia Fehr | 2-6,0-6 |
| ITF W15 Cancún | 2021/09/19 17:00 | Maria I Yapur Lopez v Natalia Fehr | 6-4,7-6 |
| ITF W25 Vigo | 2021/08/23 09:00 | Alicia Barnett v Natalia Fehr | 6-0,6-0 |
| ITF W25 Ourense | 2021/08/15 16:00 | Sakura Hosogi v Natalia Fehr | 6-0,6-1 |
| ITF W15 Savitaipale | 2021/07/26 07:00 | Marissa Minetti v Natalia Fehr | 6-3,6-1 |
| ITF W15 Irákleio | 2021/05/16 09:00 | Lena Greiner v Maria Georgiadou | 7-5,6-1 |