Stadium: Court 1 Round: 26
| ITF Women Ortisei | 2018/12/17 15:05 | Natalia Siedliska v Natalie Proese | 7-5,4-6,6-1 |
| ITF Women Sharm El Sheikh | 2018/11/21 09:15 | Natalia Siedliska v Daria Kuczer | 7-6,3-6,1-6 |
| ITF Women Muzaffarnagar | 2018/11/13 06:40 | Natalia Siedliska v Melanie Klaffner | 6-7,1-6 |
| ITF Women Heraklion | 2018/11/07 09:15 | Natalia Siedliska v Marianne Argyrokastriti | 4-6,2-6 |
| ITF Women Toronto | 2018/10/31 16:40 | Katherine Sebov v Natalia Siedliska | 6-3,6-2 |
| ITF Women Toronto | 2018/10/29 14:00 | Tori Kinard v Natalia Siedliska | 1-6,4-6 |
| ITF Women Toronto | 2018/10/28 16:35 | Layne Sleeth v Natalia Siedliska | 2-6,1-6 |
| ITF Women Toronto | 2018/10/27 14:00 | Alexandra Mikhailuk v Natalia Siedliska | 2-6,4-6 |
| ITF Women Ortisei | 2018/12/17 12:00 | Chiara De Vito v Carmen Schultheiss | 2-6,6-7 |
| ITF Women Milovice | 2018/11/28 12:00 | Lara Salden v Carmen Schultheiss | 6-3,6-1 |
| ITF Women Cordenons | 2018/11/07 12:20 | Anastasia Grymalska v Carmen Schultheiss | 6-3,7-5 |
| ITF Women Cordenons | 2018/11/05 12:05 | Carmen Schultheiss v Sofia Mariotto | 6-2,6-1 |
| ITF Women Lousada | 2018/11/01 14:50 | Carmen Schultheiss v Paula Kania-Chodun | 3-6,2-6 |
| ITF Women Lousada | 2018/10/31 15:20 | Carmen Schultheiss v Valentina Losciale | 6-3,6-1 |
| ITF Women Lousada | 2018/10/27 12:40 | Aubane Droguet v Carmen Schultheiss | 2-6,7-5,6-2 |
| ITF Women Lousada | 2018/10/26 10:00 | Carmen Schultheiss v Noelia Zeballos | 6-2,6-4 |