Stadium: Center Court Stuttgart Round: 1
| DTB German Pro Series Women | 2020/06/18 12:30 | Schultheiss, Carmen v Koelzer, Romy | 6-7,6-7 |
| DTB German Pro Series Women | 2020/06/17 09:30 | Laura Siegemund v Koelzer, Romy | 6-1,6-0 |
| DTB German Pro Series Women | 2020/06/16 14:10 | Schaeder, Laura v Koelzer, Romy | 2-6,5-7 |
| ITF - W15 Héraklion | 2020/03/12 10:00 | Astakhova, Darya v Koelzer, Romy | 6-2,3-6,4-6 |
| ITF - W15 Héraklion | 2020/03/11 08:30 | Wensveen, Sem v Koelzer, Romy | 3-6,6-2,2-6 |
| ITF - W15 Héraklion | 2020/03/07 09:00 | Koelzer, Romy v Rebeka Masarova | 3-6,0-6 |
| ITF - W15 Héraklion | 2020/03/06 08:30 | Rosca, Andreea Amalia v Koelzer, Romy | 1-6,5-7 |
| ITF - W15 Héraklion | 2020/03/05 08:30 | Biagianti, Martina v Koelzer, Romy | 6-7,1-6 |
| DTB German Pro Series Women | 2020/06/18 08:15 | Eva Lys v Mueller, Sarah | 6-2,6-2 |
| DTB German Pro Series Women | 2020/06/17 08:00 | Zaja, Anna v Eva Lys | 6-1,6-1 |
| DTB German Pro Series Women | 2020/06/16 12:00 | Matvienko, Lisa v Eva Lys | 5-7,5-7 |
| ITF W25 Altenkirchen | 2020/03/01 12:00 | Bibiane Schoofs v Eva Lys | 2-6,4-6 |
| ITF W25 Altenkirchen | 2020/02/29 12:00 | Eva Lys v Susan Bandecchi | 6-3,6-2 |
| ITF W25 Altenkirchen | 2020/02/28 13:50 | Andreea Mitu v Eva Lys | 3-6,5-7 |
| ITF W25 Altenkirchen | 2020/02/26 14:55 | Berankova, Karolina v Eva Lys | 4-6,2-6 |
| ITF - W15 Héraklion | 2019/11/09 08:00 | Melania Delai v Eva Lys | 6-4,6-2 |