Stadium: Court 1 Round: 26 Ground: Clay
| Altenkirchen, Doubles W-WITF-GER-02A | 2018/02/20 17:15 | Husaric A / Paar L-I v Koelzer R / Rueffer L | 6-7,6-2,5-10 |
| ITF Women Stuttgart WD | 2018/01/25 15:40 | Koelzer R / Rueffer L v Krejsova P / Maleckova J | 4-6,2-6 |
| ITF Women Stuttgart WD | 2018/01/24 15:30 | Maetschke L-M / Urzhumova V v Koelzer R / Rueffer L | 1-6,4-6 |
| ITF Women Hechingen WD | 2017/08/13 11:30 | Rosatello C / Shapatava S v Koelzer R / Rueffer L | 6-2,6-4 |
| ITF Women Hechingen WD | 2017/08/12 11:20 | Koelzer R / Rueffer L v Anshba A / Silich A | 6-2,6-1 |
| ITF Women Hechingen WD | 2017/08/11 15:16 | Koelzer R / Rueffer L v Anshba A / Silich A | 6-2,5-1 |
| ITF Women Hechingen WD | 2017/08/09 10:00 | Shinikova I / Zarazua R v Koelzer R / Rueffer L | 2-6,7-5,6-10 |
| ITF Women Bad Saulgau WD | 2017/08/02 17:00 | Anshba/Udvardy v Koelzer R / Rueffer L | 6-4,6-4 |