Stadium: Court 7 Round: 62 Ground: Clay
| ITF W60 - Prag | 2021/08/29 09:30 | Sina Herrmann v Kristyna Lavickova | 4-6,6-2,10-5 |
| ITF W25 - Radom | 2021/08/09 10:10 | Sina Herrmann v Aleksandra Julia Jelen | 1-6,4-6 |
| ITF W25 - Bydgoszcz | 2021/08/04 08:00 | Sina Herrmann v Carole Monnet | 6-7,6-7 |
| ITF W25 - Bydgoszcz | 2021/08/03 08:00 | Sina Herrmann v Valeriya Olyanovskaya | 4-6,6-4,10-3 |
| ITF W25 - Bydgoszcz | 2021/08/02 08:00 | Sina Herrmann v Christina Rosca | 6-1,6-2 |
| ITF W60 - Grodzisk Mazowiecki | 2021/07/26 10:40 | Mika D Fruchtman v Sina Herrmann | 1-6,6-4,10-8 |
| ITF W60 - Grodzisk Mazowiecki | 2021/07/25 12:00 | Sowjanya Bavisetti v Sina Herrmann | 1-6,1-6 |
| ITF W25 - Tarvisio | 2021/07/13 11:50 | Sina Herrmann v Cristina Dinu | 2-6,0-6 |
| ITF W60 - Prag | 2021/08/29 11:00 | Nelly Knezkova v Yana Sizikova | 1-6,0-6 |
| WTA Saint-Malo | 2021/05/02 12:15 | Yana Sizikova v Tessah Andrianjafitrimo | 6-4,0-6,5-7 |
| WTA Bogota | 2021/04/03 18:20 | Yana Sizikova v Harmony Tan | 1-6,6-4,4-6 |
| WTA - Abu Dhabi | 2021/01/05 07:35 | Anna Bondar v Yana Sizikova | 6-0,6-1 |
| ITF W25 - Kazan | 2020/01/21 07:00 | Yana Sizikova v Maria Manilova | 6-4,2-6,5-10 |
| ITF W25 - Kazan | 2020/01/20 11:25 | Yana Sizikova v Maria Mikhaylova | 6-1,6-4 |
| WTA Taipei | 2019/11/11 04:35 | Emily Webley-Smith v Yana Sizikova | 6-2,6-2 |
| WTA Taipei | 2019/11/10 04:20 | Alexandra Riley v Yana Sizikova | 4-6,2-6 |