Stadium: Court 9 Round: 25
| ITF Women Den Haag Qual | 2018/07/02 08:00 | Szupper, Marlies v Haverlag, Isabelle | 6-3,6-3 |
| 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 |
| ITF Women Verbier | 2018/06/27 07:30 | Horackova, Gabriela v Fiona Ganz | 6-3,3-6,2-6 |
| ITF Women Verbier | 2018/06/26 07:30 | Horackova, Gabriela v Enola Chiesa | 6-1,7-6 |
| ITF Women Prerov | 2018/06/13 09:00 | Hendler, Tamaryn v Horackova, Gabriela | 6-3,6-2 |
| ITF Women Prerov | 2018/06/12 09:00 | Horackova, Gabriela v Buzkova, Radka | 6-3,6-4 |
| ITF Women Nis | 2018/06/03 08:00 | Timea Jaruskova v Horackova, Gabriela | 5-7,3-6 |
| ITF Women Nis | 2018/06/02 10:50 | Horackova, Gabriela v Piai, Eduarda | 6-1,7-5 |
| ITF Women Nis | 2018/05/31 11:30 | Susan Bandecchi v Horackova, Gabriela | 2-6,1-6 |
| Antalya, Singles Qualifying W-WITF-TUR-08A | 2018/05/01 11:30 | Horackova, Gabriela v Dia Evtimova | 5-7,1-6 |