Stadium: C Round: 28
| ITF Women Wiesbaden Qual | 2018/04/23 12:00 | Constance Sibille v Natalia Siedliska | 2-6,1-6 |
| ITF Women Monastir | 2018/10/05 11:00 | Natalia Siedliska v Nadia Echeverria Alam | 6-2,6-2 |
| ITF Women Monastir | 2018/10/04 08:30 | Natalia Siedliska v Cristina Elena Tiglea | 3-6,6-2,6-2 |
| ITF Women Monastir | 2018/10/02 11:00 | Natalia Siedliska v Audrey Dabomve | 7-6,6-1 |
| ITF Women Haren | 2018/08/31 09:00 | Yukina Saigo v Natalia Siedliska | 4-6,4-6 |
| ITF Women Haren | 2018/08/30 13:45 | Maria Paulina Perez Garcia v Natalia Siedliska | 4-6,0-6 |
| ITF Women Haren | 2018/08/28 08:00 | Dewi Dijkman v Natalia Siedliska | 0-6,2-6 |
| ITF Women Rotterdam | 2018/08/25 15:30 | Marina Bassols Ribera v Natalia Siedliska | 6-2,6-2 |
| ITF Women Rotterdam | 2018/08/24 08:00 | Tayisiya Morderger v Natalia Siedliska | 6-1,4-6,1-6 |
| ITF Women Monastir | 2018/10/05 09:00 | Yasmine Mansouri v Constance Sibille | 5-7,4-6 |
| ITF Women Monastir | 2018/10/04 11:40 | Ilaria Sposetti v Constance Sibille | 0-6,1-6 |
| ITF Women Monastir | 2018/10/03 08:30 | Delisha Guttikonda v Constance Sibille | 0-6,0-6 |
| ITF Women Badenweiler | 2018/09/08 12:00 | Constance Sibille v Rebeka Masarova | 4-6,2-6 |
| ITF Women Badenweiler | 2018/09/07 09:00 | Karin Kennel v Constance Sibille | 1-6,1-6 |
| ITF Women Badenweiler | 2018/09/06 10:35 | Constance Sibille v Mina Hodzic | 3-6,6-2,6-1 |
| ITF Women Badenweiler | 2018/09/04 11:10 | Constance Sibille v Evita Ramirez | 6-1,6-2 |
| ITF Women Wanfercee-Baulet | 2018/08/23 11:00 | Constance Sibille v Anna-Giulia Remondina | 6-4,2-6,3-6 |