Stadium: Court 5 Round: 25 Ground: Clay
| Colina, Simples W-ITF-CHI-01A | 2019/11/08 17:00 | Allie Kiick v Gerlach, Katharina | 6-4,6-4 |
| ITF W25 Otocec | 2021/06/03 08:00 | Leolia Jeanjean v Allie Kiick | 6-0,7-5 |
| ITF W25 Otocec | 2021/06/02 09:40 | Chihiro Muramatsu v Allie Kiick | 3-6,4-6 |
| ITF W25 Otocec | 2021/05/28 10:00 | Allie Kiick v Dalila Jakupovic | 3-6,3-6 |
| ITF W25 Otocec | 2021/05/27 11:55 | Allie Kiick v Alice Rame | 6-1,7-5 |
| ITF W25 Otocec | 2021/05/26 10:00 | Allie Kiick v Dabrowski, Gabriela | 6-2,6-2 |
| ITF W100 Charleston | 2021/05/04 17:45 | Irina Maria Bara v Allie Kiick | 4-6,6-3,6-0 |
| ITF W60 Charlottesville | 2021/04/30 16:05 | Allie Kiick v Sachia Vickery | 3-6,5-7 |
| ITF W60 Charlottesville | 2021/04/29 16:05 | Arina Rodionova v Allie Kiick | 2-6,4-6 |
| ITF W25 Otocec | 2021/06/04 09:25 | Iva Primorac v Gerlach, Katharina | 6-4,6-4 |
| ITF W25 Otocec | 2021/06/03 09:55 | Raluca Georgiana Serban v Gerlach, Katharina | 2-6,3-6 |
| ITF W25 Otocec | 2021/06/02 13:35 | Marie Benoit v Gerlach, Katharina | 2-6,0-6 |
| ITF W60 Saint-Gaudens | 2021/05/12 07:00 | Anna Bondar v Gerlach, Katharina | 6-3,6-3 |
| ITF W60 Saint-Gaudens | 2021/05/11 13:00 | Gerlach, Katharina v Koval, Vlada | 6-1,6-4 |
| ITF W60 Saint-Gaudens | 2021/05/10 15:30 | Gerlach, Katharina v Estelle Cascino | 6-3,6-4 |
| 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 |