Stadium: Center Court Round: 54 Ground: Clay
| ITF Women Seville | 2018/10/15 07:30 | Koelzer, Romy v Horackova, Gabriela | 2-6,7-6,3-6 |
| ITF Women Bad Saulgau Qual | 2017/07/31 11:00 | Horackova, Gabriela v Koelzer, Romy | 2-6,6-3,1-6 |
| Bad Saulgau, Simples W-ITF-GER-12A | 2019/07/29 08:00 | Eva Lys v Horackova, Gabriela | 6-1,6-3 |
| ITF W25 Horb | 2019/07/23 11:30 | Horackova, Gabriela v Anna Klasen | 6-3,4-6,14-16 |
| ITF W25 Horb | 2019/07/22 13:00 | Horackova, Gabriela v Marie-Charlot Lonnemann | 6-0,6-0 |
| ITF W25 Aschaffenburg | 2019/07/15 09:00 | Triebe, Juliane v Horackova, Gabriela | 6-4,6-2 |
| ITF W25 Stuttgart | 2019/07/02 08:00 | Sofia Shapatava v Horackova, Gabriela | 6-3,6-1 |
| ITF W25 Stuttgart | 2019/07/01 16:20 | Wuarin, Pauline v Horackova, Gabriela | 2-6,3-6 |
| ITF W25 Darmstadt | 2019/06/27 10:00 | Julia Grabher v Horackova, Gabriela | 6-2,6-1 |
| ITF W25 Darmstadt | 2019/06/26 12:00 | Isabella Pfennig v Horackova, Gabriela | 3-6,6-1,1-6 |
| ITF W60 Hechingen | 2019/08/05 10:00 | Koelzer, Romy v Julia Stamatova | 6-4,3-6,8-10 |
| ITF W25 Horb | 2019/07/26 15:45 | Oana Georgeta Simion v Koelzer, Romy | 6-4,3-6,6-2 |
| ITF W25 Horb | 2019/07/25 10:00 | Manon Leonard v Koelzer, Romy | 2-6,1-6 |
| ITF W25 Aschaffenburg | 2019/07/17 11:00 | Koelzer, Romy v Indy De Vroome | 2-6,1-6 |
| ITF W25 Den Haag | 2019/07/04 07:30 | Allie Kiick v Koelzer, Romy | 6-4,6-4 |
| ITF W25 Den Haag | 2019/07/03 07:30 | Malene Helgo v Koelzer, Romy | 5-7,5-7 |
| ITF W25 Den Haag | 2019/07/02 07:30 | Koelzer, Romy v Pirazhenka, Sviatlana | 7-5,4-6,10-6 |
| ITF W25 Den Haag | 2019/07/01 09:30 | Koelzer, Romy v Karregat, Dominique | 6-3,6-1 |