Stadion: Court 1 Round: 25 Ground: Clay
| ITF Damen - W25 - Lima | 2021/10/17 15:00 | Katharina Gerlach v Dea Herdzelas | 2-6,2-6 |
| ITF Damen - W25 - Lima | 2021/10/16 17:35 | Carolina Alves v Katharina Gerlach | 6-7,1-6 |
| ITF Damen - W25 - Lima | 2021/10/15 15:00 | Anna Siskova v Katharina Gerlach | 1-6,1-6 |
| ITF Damen - W25 - Lima | 2021/10/14 17:10 | Maria Paulina Perez Garcia v Katharina Gerlach | 1-6,3-6 |
| ITF Damen - W80 - Wiesbaden | 2021/09/23 10:00 | Katharina Gerlach v Ylena In-Albon | 2-6,4-6 |
| ITF Damen - W80 - Wiesbaden | 2021/09/21 16:00 | Mina Hodzic v Katharina Gerlach | 1-6,2-6 |
| US Open - Damen | 2021/08/24 18:30 | Federica Di Sarra v Katharina Gerlach | 2-6,7-5,6-4 |
| ITF Damen - W25 - Bydgoszcz | 2021/08/07 11:00 | Katharina Gerlach v Darya Astakhova | 6-3,2-6,1-6 |
| ITF Damen - W15 - Piracicaba | 2021/10/17 13:30 | Luisa Meyer Auf Der Heide v Miriana Tona | 1-6,2-6 |
| ITF Damen - W15 - Piracicaba | 2021/10/16 16:45 | Sabastiani Leon v Miriana Tona | 1-6,2-6 |
| ITF Damen - W15 - Piracicaba | 2021/10/15 19:10 | Miriana Tona v Fernanda Astete | 6-1,6-1 |
| ITF Damen - W15 - Piracicaba | 2021/10/14 22:40 | Miriana Tona v Ana Candiotto | 6-3,6-0 |
| ITF Damen - W15 - Piracicaba | 2021/10/12 16:10 | Solana Sierra v Miriana Tona | 6-4,4-6,6-7 |
| ITF Frauen - W25 - Santa Margherita | 2019/09/16 12:00 | Giorgia Marchetti v Miriana Tona | 6-3,4-6,13-11 |
| ITF Frauen - W15 - Monastir | 2019/01/30 08:00 | Shou Na Mu v Miriana Tona | 3-6,6-3,6-1 |
| ITF Damen - Solarino | 2018/12/13 10:50 | Miriana Tona v Sara Gambogi | 1-6,2-6 |