Stadium: Center Court Kamen
| DTB German Pro Series Women | 2020/07/02 08:10 | Mona Barthel v Gerlach, Katharina | 6-4,3-6,0-6 |
| DTB German Pro Series Women | 2020/06/30 12:10 | Gerlach, Katharina v Nastasja Schunk | 4-6,4-6 |
| DTB German Pro Series Women | 2020/06/19 15:20 | Gerlach, Katharina v Julia Middendorf | 6-2,6-3 |
| 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 |
| ITF Women Oldenzaal | 2017/08/13 08:00 | Hecking, Jana v Wacker, Jennifer | 2-6,3-6 |
| ITF Women Versmold Qual | 2017/07/09 09:40 | Wachaczyk, Julia v Hecking, Jana | 6-1,6-2 |