Stadium: Center Court Stuttgart
| ITF W15 - Antalya | 2019/10/10 08:10 | Carmen Schultheiss v Romy Koelzer | 1-6,4-6 |
| ITF W15 - Antalya | 2020/02/25 07:40 | Carmen Schultheiss v Francesca Curmi | 1-6,3-6 |
| ITF W15 - Antalya | 2020/02/24 07:00 | Carmen Schultheiss v Elisa Andrea Camerano | 1-6,6-2,10-8 |
| ITF W15 - Antalya | 2020/02/17 07:00 | Carmen Schultheiss v Cemre Anil | 3-6,4-6 |
| ITF W15 - Antalya | 2020/02/16 07:00 | Carmen Schultheiss v Iuliia Nikitina | 6-2,6-2 |
| ITF - W15 - Monastir | 2019/11/05 08:30 | Carmen Schultheiss v Noesjka Brink | 6-3,6-1 |
| ITF W15 - Urtijëi | 2019/10/30 15:05 | Carmen Schultheiss v Alessandra Mazzola | 6-7,1-6 |
| ITF W15 - Urtijëi | 2019/10/29 17:00 | Carmen Schultheiss v Laura Mair | 6-3,6-2 |
| ITF W15 - Antalya | 2019/10/15 06:55 | Anastasia Tikhonova v Carmen Schultheiss | 6-3,7-6 |
| 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 |
| ITF W15 - Heraklion | 2020/03/06 08:30 | Andreea Amalia Rosca v Romy Koelzer | 1-6,5-7 |
| ITF W15 - Heraklion | 2020/03/05 08:30 | Martina Biagianti v Romy Koelzer | 6-7,1-6 |
| ITF W15 - Heraklion | 2020/03/04 08:30 | Ines Murta v Romy Koelzer | 5-7,2-6 |