Stadium: Court 4 Round: 26 Ground: Clay
| ITF W25 Klosters | 2021/06/23 12:15 | Bianca Turati v Sina Herrmann | 7-5,5-7,0-6 |
| ITF W25 Klosters | 2021/06/21 12:50 | Sina Herrmann v Joanne Zuger | 7-6,6-4 |
| ITF W25 Denain | 2021/06/15 11:50 | Guiomar Maristany Zuleta De Reales v Sina Herrmann | 6-1,6-3 |
| ITF W60 Saint-Gaudens | 2021/05/10 08:45 | Darya Astakhova v Sina Herrmann | 0-6,6-4,10-6 |
| ITF W25 Oeiras | 2021/04/22 09:45 | Rebecca Marino v Sina Herrmann | 6-3,6-2 |
| ITF W25 Oeiras | 2021/04/20 10:00 | Olga Parres Azcoitia v Sina Herrmann | 6-7,3-6 |
| ITF W25 Oeiras | 2021/04/19 11:25 | Sina Herrmann v Elsa Jacquemot | 6-4,6-4 |
| ITF W25 Oeiras | 2021/04/18 12:00 | Sina Herrmann v Natela Dzalamidze | 6-2,6-1 |
| ITF W25 Klosters | 2021/06/23 09:30 | Celine Naef v Johana Markova | 6-0,6-3 |
| ITF W25 Klosters | 2021/06/22 11:25 | Anna Gabric v Celine Naef | 6-1,2-6,1-6 |
| ITF W15 Antalya | 2021/01/29 06:30 | Cristina Dinu v Celine Naef | 6-2,6-4 |
| ITF W15 Antalya | 2021/01/28 06:00 | Lia Karatancheva v Celine Naef | 4-6,3-6 |