Stadium: Court 6 Round: 44 Ground: Hardcourt outdoor
| 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 |
| Concord, Singles W-ITF-USA-31B | 2019/08/12 16:59 | Papikian, Theresa v Mariia Kostiuk | 3-6,5-7 |
| Concord, Singles W-ITF-USA-31B | 2019/08/12 16:20 | Papikian, Theresa v Mariia Kostiuk | 3-6,5-7 |
| Nonthaburi, Simples W-ITF-THA-06A | 2019/12/04 02:30 | Ying Zhang v Yoshitomi, Aiko | 7-5,6-3 |
| Nonthaburi, Simples W-ITF-THA-06A | 2019/12/03 02:30 | Yoshitomi, Aiko v Ng, Kwan Yau | 7-5,7-5 |
| Nonthaburi, Simples W-ITF-THA-06A | 2019/12/02 05:05 | Yoshitomi, Aiko v Juliette Daries | 6-3,7-5 |
| Nonthaburi, Qualifications Simples W-ITF-THA-06A | 2019/12/01 07:10 | Yoshitomi, Aiko v Namwong, Puntila | 6-0,6-1 |
| ITF - W15 Antalya | 2019/11/19 08:30 | Orpana, Oona v Yoshitomi, Aiko | 6-0,6-3 |
| ITF - W15 Antalya | 2019/11/16 09:50 | Yoshitomi, Aiko v Ipek Oz | 1-6,1-6 |
| ITF - W15 Antalya | 2019/11/16 06:30 | Stevens, Lexie v Yoshitomi, Aiko | 4-6,5-7 |
| ITF - W15 Antalya | 2019/11/12 06:30 | Yoshitomi, Aiko v Gecsek, Fanni | 7-6,6-2 |