Round: 25 Ground: Hardcourt outdoor
| ITF Women Heraklion | 2018/03/19 09:30 | Szupper, Marlies v Youseva, Rozalina | 7-5,6-4 |
| ITF Women Heraklion | 2018/03/18 09:30 | Szupper, Marlies v Vujovic, Milica | 6-1,7-6 |
| Sharm El Sheikh, Singles W-WITF-EGY-09A | 2018/01/28 08:00 | Szupper, Marlies v Gilchrist, Nadja | 2-6,1-6 |
| Sharm El Sheikh, Singles W-WITF-EGY-09A | 2018/01/21 09:00 | Haine Ogata v Szupper, Marlies | 6-2,6-2 |
| Sharm El Sheikh, Singles W-WITF-EGY-09A | 2018/01/17 08:00 | Anastasia Potapova v Szupper, Marlies | 6-0,6-2 |
| Sharm El Sheikh, Singles W-WITF-EGY-09A | 2018/01/15 08:00 | Szupper, Marlies v Kong, Qianxin | 7-5,6-3 |
| ITF Women Stellenbosch | 2017/12/06 13:15 | Simmonds, Chanel v Szupper, Marlies | 6-4,6-4 |
| ITF Women Stellenbosch | 2017/11/28 09:25 | Sainsbury, Laura v Szupper, Marlies | 6-7,6-4,6-4 |