Stadium: Centre Court Versmold Round: 1
| DTB German Pro Series Women | 2020/06/18 16:25 | Gerlach, Katharina v Steur, Julyette Maria Josephine | 7-5,6-1 |
| DTB German Pro Series Women | 2020/06/18 07:00 | Gerlach, Katharina v Mina Hodzic | 6-3,6-4 |
| DTB German Pro Series Women | 2020/06/16 14:05 | Gerlach, Katharina v Angelina Wirges | 6-4,6-1 |
| ITF W25 Orlando | 2019/11/13 14:55 | Maria Lourdes Carle v Gerlach, Katharina | 4-6,6-3,7-5 |
| Colina, Simples W-ITF-CHI-01A | 2019/11/08 17:00 | Allie Kiick v Gerlach, Katharina | 6-4,6-4 |
| Colina, Simples W-ITF-CHI-01A | 2019/11/07 15:00 | Carolina Alves v Gerlach, Katharina | 6-7,6-4,5-7 |
| Colina, Simples W-ITF-CHI-01A | 2019/11/06 14:00 | Stefani, Luisa v Gerlach, Katharina | 1-6,2-6 |
| Asuncion, Singles Qualifying W-ITF-PAR-02A | 2019/10/29 22:50 | Renata Zarazua v Gerlach, Katharina | 6-2,6-0 |
| DTB German Pro Series Women | 2020/06/18 11:00 | Julia Middendorf v Joelle Lilly Sophie Steur | 1-6,7-5,6-2 |
| DTB German Pro Series Women | 2020/06/17 08:00 | Heisen, Vivian v Julia Middendorf | 5-7,6-4,3-6 |
| DTB German Pro Series Women | 2020/06/16 12:00 | Anna-Lena Friedsam v Julia Middendorf | 6-0,3-6,2-6 |
| ITF W25 Braunschweig | 2019/08/21 11:00 | Valeriya Strakhova v Julia Middendorf | 6-0,6-4 |
| ITF Women Hechingen Qual | 2018/08/05 09:00 | Julia Middendorf v Laura Ioana Paar | 5-7,3-6 |
| ITF Women Horb | 2018/07/25 10:00 | Julia Middendorf v Schultheiss, Carmen | 2-6,2-6 |
| WTA Stuttgart Qual | 2018/04/21 16:50 | Julia Middendorf v Marta Kostyuk | 1-6,2-6 |