Stadium: Court 3 Round: 44 Ground: Clay
| ITF W15 Palmanova | 2020/02/02 09:30 | Abed, Yara v Mariia Kostiuk | 3-6,1-6 |
| ITF - W15 Manacor | 2020/01/22 14:00 | Mariia Kostiuk v Yoshitomi, Aiko | 1-6,3-6 |
| ITF - W15 Antalya | 2020/01/13 07:00 | Mariia Kostiuk v Glaude, Laure Line | 2-6,4-6 |
| ITF - W15 Antalya | 2020/01/07 07:00 | Tinaztepe, Tuana v Mariia Kostiuk | 2-6,6-2,12-10 |
| ITF - W15 Antalya | 2019/12/15 09:00 | Skachkova, Katsiaryna v Mariia Kostiuk | 6-3,6-4 |
| ITF W25 Solarino Qual | 2019/11/25 09:00 | Mariia Kostiuk v Martinelli, Giulia | 3-6,1-6 |
| ITF W60 Montreux | 2019/09/02 08:25 | Ghitescu, Andreea v Mariia Kostiuk | 6-1,6-1 |
| Concord, Singles W-ITF-USA-31B | 2019/08/12 20:50 | Whittle, Sophia v Mariia Kostiuk | 6-1,6-1 |
| ITF - W15 Manacor | 2020/01/22 14:00 | Orange, Margaux v Cortijo Parreno, Blanca | 6-2,6-4 |
| ITF W15 Ceuta | 2019/09/12 10:30 | Kalaitzis, Victoria v Cortijo Parreno, Blanca | 6-0,6-1 |
| ITF W15 Ceuta | 2019/09/11 12:00 | Cortijo Parreno, Blanca v Evdokimova, Aleksandra | 6-3,6-2 |
| ITF W15 Don Benito | 2019/07/16 08:45 | Cortijo Parreno, Blanca v Maria Aran T Garcia | 3-6,3-6 |
| ITF Women Nules | 2018/11/19 11:00 | Ayala Serra, Nora v Cortijo Parreno, Blanca | 6-3,6-0 |
| ITF Women Nules | 2018/11/17 11:00 | Cortijo Parreno, Blanca v Garri Murcia, Carmen | 6-1,6-4 |