Stadium: Court 3 Round: 54 Ground: Clay
| ITF W25 Oeiras | 2021/05/01 09:25 | Gerlach, Katharina v Guttierez Carrasco, Maria | 3-6,3-6 |
| ITF W25 Oeiras | 2021/04/30 13:20 | Malene Helgo v Gerlach, Katharina | 2-6,4-6 |
| ITF W25 Oeiras | 2021/04/29 10:00 | Amandine Hesse v Gerlach, Katharina | 1-6,2-6 |
| ITF W25 Oeiras | 2021/04/28 12:10 | Ekaterina Makarova v Gerlach, Katharina | 4-6,6-2,3-6 |
| WTA - Stuttgart | 2021/04/18 12:30 | Voegele, Stefanie v Gerlach, Katharina | 6-3,6-1 |
| WTA - Stuttgart | 2021/04/17 15:55 | Gerlach, Katharina v Laura Ioana Paar | 6-3,7-5 |
| WTA Charleston Qual | 2021/04/10 15:00 | Gerlach, Katharina v Storm Hunter | 3-6,2-6 |
| WTA - Bogota | 2021/04/04 15:00 | Gerlach, Katharina v Daniela Seguel | 1-6,1-6 |
| ITF W25 Calvi | 2021/04/15 10:30 | Estelle Cascino v Suvrijn, Jade | 2-6,2-6 |
| ITF W25 Calvi | 2021/04/14 12:20 | Verena Meliss v Estelle Cascino | 2-6,4-6 |
| ITF - W15 Gonesse | 2021/03/20 13:50 | Marine Partaud v Estelle Cascino | 6-3,6-1 |
| ITF - W15 Gonesse | 2021/03/19 11:00 | Tess Sugnaux v Estelle Cascino | 2-6,3-6 |
| ITF - W15 Gonesse | 2021/03/18 11:15 | Estelle Cascino v Francisca Jorge | 6-4,4-6,7-6 |
| ITF - W15 Gonesse | 2021/03/17 11:40 | Lois Boisson v Estelle Cascino | 4-6,1-6 |
| ITF W25 Poitiers | 2021/02/22 15:45 | Arianne Hartono v Estelle Cascino | 6-2,6-3 |
| ITF W25 Poitiers | 2021/02/22 11:45 | Martina Spigarelli v Estelle Cascino | 2-6,6-7 |