Stadium: Centre Court Versmold Round: 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 |
| ITF W25 Seville | 2019/10/17 09:25 | Gerlach, Katharina v Cristina Bucsa | 6-2,4-6,5-7 |
| DTB German Pro Series Women | 2020/06/16 09:25 | Steur, Julyette Maria Josephine v Mina Hodzic | 2-6,1-6 |
| ITF - W15 Antalya | 2020/03/12 07:25 | Steur, Julyette Maria Josephine v Sinja Kraus | 6-4,6-1 |
| ITF - W15 Antalya | 2020/03/11 07:00 | Steur, Julyette Maria Josephine v Ilay Yoruk | 6-0,6-2 |
| ITF - W15 Antalya | 2020/02/17 07:00 | Steur, Julyette Maria Josephine v Han, Jiangxue | 6-3,4-6,6-4 |
| ITF - W15 Antalya | 2020/02/16 10:30 | Steur, Julyette Maria Josephine v Elina Avanesyan | 3-6,6-2,10-8 |
| ITF - W15 Antalya | 2020/02/16 07:00 | Steur, Julyette Maria Josephine v Nina Stadler | 6-2,6-1 |
| ITF - W15 Antalya | 2020/02/15 10:30 | Steur, Julyette Maria Josephine v Julia Stamatova | 7-5,6-1 |
| ITF - W15 Antalya | 2020/02/14 12:15 | Steur, Julyette Maria Josephine v Paykoc, Deniz | 6-0,6-0 |