Stadium: Court 1 Round: 19 Ground: Grass
| DTB German Pro Series Women | 2020/06/30 14:05 | Anna Zaja v Julia Middendorf | 7-5,7-5 |
| ITF W25 Jonkoping | 2021/06/16 11:10 | Carol Zhao v Anna Zaja | 6-4,4-6,6-2 |
| ITF W25 Jonkoping | 2021/06/15 08:10 | Joanne Zuger v Anna Zaja | 5-7,4-6 |
| ITF W25 Liepaja | 2021/05/29 08:00 | Anna Zaja v Daniela Vismane | 6-1,3-6,4-6 |
| ITF W25 Liepaja | 2021/05/28 14:00 | Anna Zaja v Kamilla Bartone | 6-0,6-2 |
| ITF W25 Liepaja | 2021/05/28 09:20 | Anna Zaja v Maileen Nuudi | 6-3,5-7,6-2 |
| ITF W25 Liepaja | 2021/05/26 09:25 | Valentyna Ivakhnenko v Anna Zaja | 2-6,3-6 |
| ITF W15 Sibenik | 2021/05/19 14:15 | Oleksandra Oliynykova v Anna Zaja | 4-6,6-3,6-3 |
| WTA Stuttgart | 2021/04/17 16:00 | Stefanie Voegele v Anna Zaja | 6-1,6-3 |
| WTA Berlin | 2021/06/12 16:15 | Julia Middendorf v Stefanie Voegele | 1-6,2-6 |
| WTA Stuttgart | 2021/04/20 12:05 | Julia Middendorf v Anett Kontaveit | 2-6,3-6 |
| WTA Stuttgart | 2021/04/18 09:00 | Tamara Korpatsch v Julia Middendorf | 6-2,3-6,0-6 |
| WTA Stuttgart | 2021/04/17 08:00 | Julia Middendorf v Jana Fett | 4-6,6-1,6-3 |
| ITF W25 Altenkirchen | 2021/02/15 11:00 | Julia Middendorf v Yuriko Lily Miyazaki | 6-3,3-6,5-10 |
| ITF W25 Hamburg | 2021/01/12 13:40 | Julia Middendorf v Ioana Loredana Rosca | 7-5,3-6,5-7 |
| German Championship Women | 2020/12/10 09:00 | Julia Middendorf v Eva Lys | 3-6,6-7 |
| German Championship Women | 2020/12/08 11:00 | Julia Middendorf v Charlotte Klasen | 6-3,6-3 |