Stadium: Court 3 Round: 54
| ITF Women Hammamet | 2018/02/19 08:30 | Sibille, Constance v Mugelli, Lidia | 6-4,6-3 |
| ITF Women Petange | 2017/10/30 18:25 | Sibille, Constance v Arlinda Rushiti | 5-7,4-6 |
| ITF Women Joue-Les-Tours Qual | 2017/10/14 13:00 | Vrljic, Ana v Sibille, Constance | 6-2,6-1 |
| ITF Women Saint Malo Qual | 2017/09/17 12:50 | Sibille, Constance v Kordolaimi, Eleni | 1-6,1-6 |
| ITF Women Saint Malo Qual | 2017/09/16 10:30 | Sireix, Camille v Sibille, Constance | 6-7,3-6 |
| ITF Women Badenweiler | 2017/09/07 12:40 | Sibille, Constance v Mina Hodzic | 2-6,5-7 |
| ITF Women Badenweiler | 2017/09/05 14:10 | Fontana, Kim v Sibille, Constance | 4-6,4-6 |
| ITF Women Middelkerke | 2017/09/02 12:00 | Steur, Julyette Maria Josephine v Sibille, Constance | 6-3,7-6 |
| ITF Women Hammamet | 2018/04/05 09:00 | Natalia Siedliska v Mirjam Bjorklund | 5-7,2-6 |
| ITF Women Hammamet | 2018/04/03 09:00 | Natalia Siedliska v Markovic, Vera | 6-0,6-0 |
| ITF Women Hammamet | 2018/03/29 11:15 | Natalia Siedliska v Seone Mendez | 3-6,4-6 |
| ITF Women Hammamet | 2018/03/28 14:35 | Natalia Siedliska v Temin, Marie | 4-6,6-1,6-4 |
| ITF Women Heraklion | 2018/03/16 09:00 | Natalia Siedliska v Anna Bondar | 6-3,6-4 |
| ITF Women Heraklion | 2018/03/15 10:00 | Boualem, Josephine v Natalia Siedliska | 4-6,4-6 |
| ITF Women Heraklion | 2018/03/14 10:50 | Natalia Siedliska v Prati, Federica | 7-5,6-3 |
| Altenkirchen, Singles W-WITF-GER-02A | 2018/02/20 18:00 | Natalia Siedliska v Urszula Radwanska | 6-2,2-6,1-6 |