Stadium: Court 9 Round: 62
| ITF Women Den Haag Qual | 2018/07/01 08:00 | Szupper, Marlies v Rubbrecht, Antje | 6-4,6-1 |
| ITF Women Den Haag Qual | 2018/06/30 09:30 | Szupper, Marlies v Melgers, Annick | 6-3,6-4 |
| ITF Women Alkmaar | 2018/06/29 09:00 | Szupper, Marlies v Yudanov, Marina | 0-6,0-6 |
| ITF Women Alkmaar | 2018/06/28 09:00 | Cameron, Dainah v Szupper, Marlies | 0-6,0-6 |
| ITF Women Alkmaar | 2018/06/26 13:25 | Noa Liauw A Fong v Szupper, Marlies | 3-6,3-6 |
| Cairo, Singles W-WITF-EGY-02A | 2018/05/04 10:30 | Reddy, Snehadevi S v Szupper, Marlies | 6-1,6-0 |
| Cairo, Singles W-WITF-EGY-02A | 2018/05/01 07:30 | Szupper, Marlies v Talcott, Shelby | 2-6,6-4,6-2 |
| Cairo, Singles W-WITF-EGY-02A | 2018/04/25 14:10 | Abou Zekry, Ola v Szupper, Marlies | 6-1,2-6,6-2 |
| ITF Women Den Haag Qual | 2018/07/01 08:00 | Haverlag, Isabelle v Ramasamy, Brindtha | 6-3,6-4 |