Stadium: Center Court Round: 26 Ground: Clay
| ITF W15 Erwitte | 2021/08/17 11:00 | Sofia Costoulas v Carolina Kuhl | 6-0,4-6,4-6 |
| ITF W25 Hamburg | 2021/01/10 11:30 | Ioana Loredana Rosca v Carolina Kuhl | 6-1,6-4 |
| ITF W15 Erwitte | 2021/08/17 11:00 | Nicole Rivkin v Julia Middendorf | 2-6,1-6 |
| WTA Bad Homburg | 2021/06/20 09:00 | Anna Zaja v Julia Middendorf | 6-2,7-5 |
| 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 |