Stadium: Court 5 Round: 25 Ground: Clay
| ITF W25 Ystad | 2019/06/19 10:25 | Romy Koelzer v Richel Hogenkamp | 1-6,4-6 |
| ITF W25 Obidos | 2019/05/14 14:30 | Romy Koelzer v Marina Bassols Ribera | 5-7,7-5,0-6 |
| ITF W25 Obidos | 2019/05/08 15:05 | Amanda Carreras v Romy Koelzer | 6-3,6-4 |
| ITF W25 Santa Margherita | 2019/05/01 16:30 | Lisa Matviyenko v Romy Koelzer | 6-1,1-6,6-1 |
| ITF W25 Chiasso | 2019/04/24 07:15 | Stephanie Wagner v Romy Koelzer | 6-0,6-2 |
| ITF W25 Chiasso | 2019/04/22 13:50 | Romy Koelzer v Anne Schaefer | 6-2,6-3 |
| ITF W25 Chiasso | 2019/04/22 07:00 | Romy Koelzer v Laura Svatikova | 6-3,6-3 |
| ITF W25 Obidos | 2019/04/11 09:00 | Sofia Shapatava v Romy Koelzer | 2-6,6-4,7-6 |
| ITF W25 Prerov | 2019/06/13 10:20 | Miriam Bulgaru v Katarzyna Piter | 7-5,6-3 |
| ITF W25 Prerov | 2019/06/12 12:40 | Veronika Vlkovska v Katarzyna Piter | 6-4,1-6,4-6 |
| WTA Strasbourg | 2019/05/18 09:15 | Katarzyna Piter v Renata Zarazua | 5-7,1-6 |
| ITF W25 Osprey | 2019/04/25 17:00 | Katarzyna Piter v Usue Maitane Arconada | 2-6,4-6 |
| ITF W25 Osprey | 2019/04/23 18:10 | Katarzyna Piter v Zuzana Zlochova | 6-3,6-1 |
| ITF W80 Dothan | 2019/04/16 17:25 | Kristina Kucova v Katarzyna Piter | 6-2,6-0 |
| ITF W80 Dothan | 2019/04/15 19:40 | Emerald Able v Katarzyna Piter | 1-6,1-6 |
| ITF W25 Pelham | 2019/04/11 15:00 | Katarzyna Piter v Caroline Dolehide | 3-6,1-6 |