Stadium: Court 13 Round: 14 Ground: Hardcourt outdoor
| ITF W25 Brno | 2019/09/28 08:00 | Federica Di Sarra v Katharina Gerlach | 1-6,6-2,6-3 |
| ITF Women Horb | 2018/07/26 15:45 | Federica Di Sarra v Katharina Gerlach | 1-6,1-6 |
| ITF W60 Versmold | 2021/08/01 11:00 | Elina Avanesyan v Federica Di Sarra | 6-7,6-2,6-2 |
| ITF W60 Versmold | 2021/07/31 11:00 | Federica Di Sarra v Cristiana Ferrando | 3-6,6-4,6-3 |
| ITF W60 Versmold | 2021/07/30 13:25 | Jaimee Fourlis v Federica Di Sarra | 3-6,4-6 |
| ITF W60 Versmold | 2021/07/29 12:15 | Federica Di Sarra v Anna Klasen | 6-4,6-4 |
| ITF W60 Versmold | 2021/07/28 11:00 | Federica Di Sarra v Noma Noha Akugue | 6-1,6-1 |
| WTA Gdynia | 2021/07/19 11:05 | Federica Di Sarra v Irina Maria Bara | 3-6,6-1,5-7 |
| WTA Gdynia | 2021/07/18 09:00 | Federica Di Sarra v Tereza Mrdeza | 6-4,7-5 |
| WTA Gdynia | 2021/07/17 09:00 | Gabriela Talaba v Federica Di Sarra | 4-6,3-6 |
| ITF W25 Bydgoszcz | 2021/08/07 11:00 | Katharina Gerlach v Darya Astakhova | 6-3,2-6,1-6 |
| ITF W25 Bydgoszcz | 2021/08/06 14:00 | Katharina Gerlach v Nina Potocnik | 6-1,6-4 |
| ITF W25 Bydgoszcz | 2021/08/05 10:40 | Katharina Gerlach v Yuliana Lizarazo | 3-6,6-3,6-4 |
| ITF W25 Bydgoszcz | 2021/08/04 07:55 | Katharina Gerlach v Tayisiya Morderger | 6-3,6-0 |
| ITF W60 Versmold | 2021/07/28 13:05 | Mirjam Bjorklund v Katharina Gerlach | 6-4,6-2 |
| WTA Palermo | 2021/07/20 18:00 | Danielle Rose Collins v Katharina Gerlach | 7-5,6-3 |
| WTA Palermo | 2021/07/18 17:45 | Despina Papamichail v Katharina Gerlach | 4-6,6-2,5-7 |
| WTA Palermo | 2021/07/17 16:35 | Lisa Pigato v Katharina Gerlach | 5-7,6-7 |