Stadium: Court 3 Round: 25 Ground: Clay
| ITF W25 Darmstadt | 2019/06/25 16:00 | Romy Koelzer v Katarzyna Piter | 5-7,6-2,2-6 |
| ITF W25 Leipzig | 2019/08/13 10:40 | Caroline Werner v Romy Koelzer | 6-4,3-6,11-9 |
| ITF W25 Leipzig | 2019/08/12 13:00 | Gabriela Horackova v Romy Koelzer | 3-6,6-3,5-10 |
| ITF W60 Hechingen | 2019/08/05 10:00 | Romy Koelzer v Julia Stamatova | 6-4,3-6,8-10 |
| ITF W25 Horb | 2019/07/26 15:45 | Oana Georgeta Simion v Romy Koelzer | 6-4,3-6,6-2 |
| ITF W25 Horb | 2019/07/25 10:00 | Manon Leonard v Romy Koelzer | 2-6,1-6 |
| ITF W25 Aschaffenburg | 2019/07/17 11:00 | Romy Koelzer v Indy De Vroome | 2-6,1-6 |
| ITF W25 Den Haag | 2019/07/04 07:30 | Allie Kiick v Romy Koelzer | 6-4,6-4 |
| ITF W25 Den Haag | 2019/07/03 07:30 | Malene Helgo v Romy Koelzer | 5-7,5-7 |
| ITF W60 Warsaw | 2019/08/08 10:00 | Katarzyna Piter v Yue Yuan | 5-7,3-6 |
| ITF W60 Warsaw | 2019/08/07 08:00 | Katarzyna Piter v Maryna Chernyshova | 6-3,6-4 |
| ITF W25 Grodzisk Mazowiecki | 2019/08/03 12:30 | Maja Chwalinska v Katarzyna Piter | 6-2,6-2 |
| ITF W25 Grodzisk Mazowiecki | 2019/08/02 13:40 | Katarzyna Piter v Ulrikke Eikeri | 6-3,7-6 |
| ITF W25 Grodzisk Mazowiecki | 2019/08/01 13:40 | Katarzyna Piter v Viktoriia Dema | 6-2,6-1 |
| ITF W25 Grodzisk Mazowiecki | 2019/07/31 11:30 | Katarzyna Piter v Timea Jaruskova | 6-1,6-4 |
| ITF W25 Bytom | 2019/07/27 10:00 | Nina Potocnik v Katarzyna Piter | 5-7,6-4,6-1 |
| ITF W25 Bytom | 2019/07/26 11:00 | Ipek Soylu v Katarzyna Piter | 5-7,6-1,4-6 |