Stadium: Court 3 Round: 25 Ground: Clay
| ITF - W60 Collonge-Bellerive | 2021/08/31 08:00 | Ipek Oz v Alena Fomina-Klotz | 2-6,3-6 |
| ITF - W60 Collonge-Bellerive | 2021/08/30 08:00 | Alena Fomina-Klotz v Arlinda Rushiti | 6-3,6-1 |
| ITF - W25 Grado | 2021/05/30 10:30 | Nuria Brancaccio v Alena Fomina-Klotz | 6-2,6-3 |
| ITF - W25 Přerov | 2020/09/21 09:00 | Miriam Bulgaru v Alena Fomina-Klotz | 6-2,6-1 |
| ITF - W15 Stuttgart | 2020/01/19 09:00 | Alena Fomina-Klotz v Yvette Schmucker | 6-2,3-6,13-15 |
| ITF - W15 Milovice | 2019/11/25 11:00 | Klara Hajkova v Alena Fomina-Klotz | 2-6,6-3,4-10 |
| ITF - W60 Nantes | 2019/10/28 13:10 | Alena Fomina-Klotz v Noelia Zeballos | 6-4,3-6,10-4 |
| ITF - W25 Stuttgart | 2019/07/01 09:25 | Kristina Milenkovic v Alena Fomina-Klotz | 7-6,6-2 |
| US Open - ženy | 2021/08/24 18:30 | Federica Di Sarra v Katharina Gerlach | 2-6,7-5,6-4 |
| 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 |