Stadium: C Round: 27
| ITF Women Stuttgart WD | 2018/01/23 14:00 | A Schmidt / A Vecic v Maetschke L-M / Urzhumova V | 5-7,5-7 |
| 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 |
| Versmold, Doubles W-WITF-GER-04A | 2017/07/14 13:30 | Gerlach K / Wachaczyk J v Koelzer R / Rueffer L | 6-3,3-6,13-11 |
| Versmold, Doubles W-WITF-GER-04A | 2017/07/13 15:35 | Eikeri U / Marand S v Koelzer R / Rueffer L | 6-2,4-6,6-10 |
| Versmold, Doubles W-WITF-GER-04A | 2017/07/11 14:15 | Koelzer R / Rueffer L v Rus A / Schoofs B | 6-1,6-7,10-7 |