Stadium: Clay Court 10 Round: 25 Ground: Clay
| ITF - W15 Héraklion | 2020/11/08 09:00 | Koelzer, Romy v Gergana Topalova | 4-6,0-6 |
| ITF - W15 Héraklion | 2020/11/07 09:00 | Rosca, Andreea Amalia v Koelzer, Romy | 2-6,6-3,2-6 |
| ITF - W15 Héraklion | 2020/11/06 08:00 | Koelzer, Romy v Markova, Johana | 6-4,4-6,6-4 |
| ITF - W15 Héraklion | 2020/11/05 08:00 | Koelzer, Romy v Melania Delai | 4-6,6-2,6-3 |
| ITF - W15 Héraklion | 2020/11/03 09:00 | Detiuc, Anastasia v Koelzer, Romy | 6-4,0-6,0-6 |
| ITF - W15 Héraklion | 2020/10/31 13:00 | Cadantu, Alexandra v Koelzer, Romy | 6-3,6-1 |
| ITF - W15 Héraklion | 2020/10/31 07:55 | Rosca, Ioana Loredana v Koelzer, Romy | 3-6,6-2,4-6 |
| ITF - W15 Héraklion | 2020/10/30 10:10 | Koelzer, Romy v Astakhova, Darya | 6-4,0-6,6-3 |
| Ortisei, Singles W-ITF-ITA-28A | 2020/11/03 11:50 | Turati, Bianca v Viertler, Marion | 6-4,6-2 |
| ITF W25 Tarvisio | 2020/09/08 07:30 | Viertler, Marion v Antonitsch, Mira | 4-6,2-6 |
| ITF W25 Antalya | 2020/03/05 06:55 | Viertler, Marion v Sherif, M. | 2-6,1-6 |
| ITF W25 Antalya | 2020/03/04 11:25 | Viertler, Marion v Zoziya Kardava | 6-1,7-5 |
| ITF W25 Antalya | 2020/03/03 07:00 | Viertler, Marion v Maria F Herazo Gonzalez | 6-4,7-5 |
| ITF W25 Antalya | 2020/03/02 07:00 | Meiqi Guo v Viertler, Marion | 3-6,3-6 |
| ITF W25 Antalya | 2020/03/01 07:00 | Viertler, Marion v Peckl, Kerstin | 6-0,6-1 |
| ITF - W15 Antalya | 2020/02/27 08:25 | Han, Jiangxue v Viertler, Marion | 6-0,6-1 |