Stadium: Cancha 2 Round: 25 Ground: Clay
| ITF W25 Guayaquil | 2021/10/28 19:05 | Katharina Gerlach v Brittany Collens | 6-0,6-1 |
| ITF W25 Tucuman | 2022/02/01 12:00 | Miriana Tona v Brittany Collens | 6-1,6-0 |
| ITF W25 Tucuman | 2022/01/31 13:25 | Agostina Landa v Brittany Collens | 4-6,3-6 |
| ITF W15 Cundinamarca | 2021/11/17 14:30 | Maria Lota Kaul v Brittany Collens | 1-6,6-2,6-1 |
| ITF W25 Guayaquil | 2021/10/28 19:05 | Katharina Gerlach v Brittany Collens | 6-0,6-1 |
| ITF W25 Rio do Sul | 2021/10/19 12:00 | Brittany Collens v Elsa Wan | 2-6,3-6 |
| ITF W15 Cancun | 2021/10/13 14:00 | Brittany Collens v Breana Stampfli | 2-6,3-6 |
| ITF W15 Cancun | 2021/10/06 14:00 | Brittany Collens v Stacey Fung | 1-6,0-6 |
| ITF W15 Cancun | 2021/10/05 14:00 | Brittany Collens v Anna Rogers | 0-6,0-6 |
| Australian Open Women | 2022/01/09 23:00 | Alexandra Cadantu v Katharina Gerlach | 6-3,6-1 |
| ITF W60 Bendigo | 2022/01/03 00:30 | Cristina Bucsa v Katharina Gerlach | 7-5,6-3 |
| WTA Montevideo | 2021/11/15 17:30 | Katharina Gerlach v Irina Maria Bara | 6-3,1-6,1-6 |
| ITF W60 Santiago | 2021/11/10 17:25 | Katharina Gerlach v Emiliana Arango | 1-6,4-6 |
| ITF W60 Santiago | 2021/11/08 19:40 | Katharina Gerlach v Javiera Verdugo | 6-0,6-0 |
| WTA Buenos Aires | 2021/11/04 15:30 | Mayar Sherif v Katharina Gerlach | 6-3,6-2 |
| WTA Buenos Aires | 2021/11/02 18:00 | Barbara Gatica v Katharina Gerlach | 6-1,6-7,4-6 |
| ITF W25 Guayaquil | 2021/10/31 15:00 | Katharina Gerlach v Laura Pigossi | 0-6,2-6 |