Stadium: Center Court Round: 45 Ground: Carpet indoor
| ITF W60 Rome GA | 2021/01/28 00:10 | Irene Burillo Escorihuela v Gerlach, Katharina | 3-6,6-2,6-1 |
| ITF W25 Fujairah | 2021/01/19 09:45 | Gerlach, Katharina v Xinyu Wang | 1-6,2-6 |
| ITF W25 Fujairah | 2021/01/18 07:35 | Gerlach, Katharina v Semenistaja, Marija | 6-0,6-0 |
| Open d'Australie - Femmes | 2021/01/12 13:25 | Gerlach, Katharina v Hibi, Mayo | 3-6,4-6 |
| Open d'Australie - Femmes | 2021/01/11 12:55 | Voegele, Stefanie v Gerlach, Katharina | 3-6,4-6 |
| ITF W25 Selva Gardena | 2020/12/15 16:00 | Tena Lukas v Gerlach, Katharina | 7-5,7-6 |
| German Championship Women | 2020/12/10 12:00 | Gerlach, Katharina v Mara Guth | 5-7,6-4,2-6 |
| ITF W15 LPD Gran Canaria | 2020/11/28 12:15 | Andrea Lazaro Garcia v Gerlach, Katharina | 6-3,6-2 |
| ITF W15 Villena | 2021/02/11 09:00 | Ekaterina Yashina v Shiho Akita | 6-4,6-3 |
| ITF W15 Villena | 2021/02/10 08:30 | Marthiens, Karen v Shiho Akita | 3-6,6-3,5-7 |
| ITF - W15 Manacor | 2021/02/05 10:30 | Suzan Lamens v Shiho Akita | 6-2,6-3 |
| ITF - W15 Manacor | 2021/02/04 09:45 | Victoria Jimenez Kasintseva v Shiho Akita | 1-6,3-6 |
| ITF - W15 Manacor | 2021/02/02 11:30 | Lisa Pigato v Shiho Akita | 1-6,4-6 |
| ITF - W15 Manacor | 2021/01/30 12:05 | Simona Waltert v Shiho Akita | 6-3,6-4 |
| ITF - W15 Manacor | 2021/01/29 09:55 | Alice Robbe v Shiho Akita | 6-2,4-6,3-6 |
| ITF - W15 Manacor | 2021/01/28 09:00 | Kamilla Bartone v Shiho Akita | 3-6,3-6 |