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