Stadium: Centre Court Darmstadt
| ITF Women Braunschweig | 2018/08/22 09:00 | Jule Niemeier v Romy Koelzer | 6-3,7-5 |
| DTB German Pro Series - Damer | 2020/07/01 09:30 | Laura Siegemund v Jule Niemeier | 6-4,6-4 |
| DTB German Pro Series - Damer | 2020/06/30 13:20 | Jule Niemeier v Mina Hodzic | 6-2,7-5 |
| DTB German Pro Series - Damer | 2020/06/19 12:30 | Nastasja Schunk v Jule Niemeier | 6-1,6-0 |
| DTB German Pro Series - Damer | 2020/06/18 14:55 | Mona Barthel v Jule Niemeier | 7-6,6-2 |
| DTB German Pro Series - Damer | 2020/06/17 09:35 | Jule Niemeier v Mara Guth | 6-1,6-3 |
| DTB German Pro Series - Damer | 2020/06/16 10:20 | Jule Niemeier v Nicole Rivkin | 6-2,5-7,6-4 |
| ITF W25 - Kairo | 2020/03/11 08:00 | Clothilde De Bernardi v Jule Niemeier | 6-7,7-5,6-3 |
| ITF W25 - Altenkirchen | 2020/02/27 15:25 | Bibiane Schoofs v Jule Niemeier | 6-3,7-6 |
| DTB German Pro Series - Damer | 2020/07/01 14:00 | Romy Koelzer v Mina Hodzic | 7-6,6-4 |
| DTB German Pro Series - Damer | 2020/06/30 09:40 | Laura Siegemund v Romy Koelzer | 6-0,6-2 |
| DTB German Pro Series - Damer | 2020/06/18 12:30 | Carmen Schultheiss v Romy Koelzer | 6-7,6-7 |
| DTB German Pro Series - Damer | 2020/06/17 09:30 | Laura Siegemund v Romy Koelzer | 6-1,6-0 |
| DTB German Pro Series - Damer | 2020/06/16 14:10 | Laura Schaeder v Romy Koelzer | 2-6,5-7 |
| ITF W15 - Heraklion | 2020/03/12 10:00 | Darya Astakhova v Romy Koelzer | 6-2,3-6,4-6 |
| ITF W15 - Heraklion | 2020/03/11 08:30 | Sem Wensveen v Romy Koelzer | 3-6,6-2,2-6 |
| ITF W15 - Heraklion | 2020/03/07 09:00 | Romy Koelzer v Rebeka Masarova | 3-6,0-6 |