| ITF W15 LPD Gran Canaria | 2020/11/28 12:15 | Andrea Lazaro Garcia v Katharina Gerlach | 6-3,6-2 |
| ITF W15 LPD Gran Canaria | 2020/11/27 10:10 | Oksana Selekhmeteva v Katharina Gerlach | 6-4,0-6,3-6 |
| ITF W15 LPD Gran Canaria | 2020/11/26 12:40 | Laura Pigossi v Katharina Gerlach | 4-6,3-6 |
| ITF W15 LPD Gran Canaria | 2020/11/25 13:15 | Lucia Cortez Llorca v Katharina Gerlach | 2-6,2-6 |
| ITF W25 LPD Gran Canaria | 2020/11/17 15:30 | Katharina Gerlach v Richel Hogenkamp | 2-6,6-4,3-6 |
| WTA Linz | 2020/11/07 10:15 | Irina Maria Bara v Katharina Gerlach | 2-6,6-3,6-4 |
| ITF W25 Reims | 2020/10/21 12:40 | Harmony Tan v Katharina Gerlach | 6-0,6-0 |
| ITF W25 Reims | 2020/10/19 09:55 | Katharina Gerlach v Maia Lumsden | 7-5,6-3 |
| German Championship - nők | 2020/12/09 09:00 | Chantal Sauvant v Mara Guth | 5-7,3-6 |
| DTB German Pro Series - nők | 2020/06/19 09:20 | Caroline Werner v Mara Guth | 6-4,6-4 |
| DTB German Pro Series - nők | 2020/06/18 12:15 | Mara Guth v Jasmin Jebawy | 7-5,6-4 |
| DTB German Pro Series - nők | 2020/06/17 09:35 | Jule Niemeier v Mara Guth | 6-1,6-3 |
| DTB German Pro Series - nők | 2020/06/16 16:55 | Mona Barthel v Mara Guth | 6-0,6-2 |
| ITF Women Wiesbaden Qual | 2018/04/23 12:00 | Teliana Pereira v Mara Guth | 6-3,6-1 |