Stadium: Court 5 Round: 25 Ground: Clay
| ITF W60 Versmold | 2021/07/28 13:05 | Mirjam Bjorklund v Katharina Gerlach | 6-4,6-2 |
| WTA Palermo | 2021/07/20 18:00 | Danielle Rose Collins v Katharina Gerlach | 7-5,6-3 |
| WTA Palermo | 2021/07/18 17:45 | Despina Papamichail v Katharina Gerlach | 4-6,6-2,5-7 |
| WTA Palermo | 2021/07/17 16:35 | Lisa Pigato v Katharina Gerlach | 5-7,6-7 |
| WTA Budapest | 2021/07/10 09:55 | Miriam Bulgaru v Katharina Gerlach | 6-3,4-6,6-2 |
| WTA Hamburg | 2021/07/06 08:00 | Anna Zaja v Katharina Gerlach | 7-5,3-6,6-4 |
| WTA Hamburg | 2021/07/05 08:00 | Katarzyna Piter v Katharina Gerlach | 2-6,5-7 |
| Wimbledon Women | 2021/06/22 18:05 | Katharina Gerlach v Astra Sharma | 4-6,0-6 |
| ITF W25 Bydgoszcz | 2021/08/03 10:15 | Tayisiya Morderger v Sakura Hosogi | 6-4,6-0 |
| ITF W25 Bydgoszcz | 2021/08/02 09:40 | Tayisiya Morderger v Martina Marusinova | 6-4,6-1 |
| ITF W60 Versmold | 2021/07/25 07:55 | Vlada Koval v Tayisiya Morderger | 6-2,4-6,10-6 |
| ITF W60 Amstelveen | 2021/07/07 09:30 | Tayisiya Morderger v Barbara Haas | 6-0,5-7,3-6 |
| ITF W60 Amstelveen | 2021/07/06 07:50 | Amina Anshba v Tayisiya Morderger | 1-6,6-1,9-11 |
| ITF W60 Amstelveen | 2021/07/05 08:00 | Perla Nieuwboer v Tayisiya Morderger | 0-6,0-6 |
| ITF W60 Montpellier | 2021/06/27 08:00 | Tayisiya Morderger v Oksana Selekhmeteva | 2-6,3-6 |
| ITF W60 Stare Splavy | 2021/06/15 07:55 | Tayisiya Morderger v Miriam Kolodziejova | 2-6,6-4,7-10 |