Stadium: Court 3 Round: 26
| ITF Women Wesley Chapel Qual | 2018/01/23 19:40 | Mari Osaka v Olga Ianchuk | 6-7,4-6 |
| ITF Women Orlando Qual | 2018/01/14 15:00 | Mari Osaka v Caitlin Whoriskey | 3-6,6-7 |
| ITF Women Daytona Beach | 2018/01/12 15:00 | Mari Osaka v Grace Min | 6-7,4-6 |
| ITF Women Daytona Beach | 2018/01/11 16:30 | Elena-Gabriela Ruse v Mari Osaka | 6-7,3-6 |
| ITF Women Daytona Beach | 2018/01/11 01:05 | Mari Osaka v Kyoka Okamura | 6-1,6-1 |
| WTA Honolulu Qual | 2017/11/19 22:45 | Mari Osaka v Haruka Kaji | 3-6,5-7 |
| WTA Limoges Qual | 2017/11/05 12:00 | Mari Osaka v Olga Saez Larra | 6-1,3-6,6-7 |
| WTA Limoges Qual | 2017/11/04 13:35 | Silvia Soler-Espinosa v Mari Osaka | 3-6,7-6,4-6 |
| ITF Women Irapuato | 2018/03/13 21:10 | Nika Kukharchuk v Jovana Jaksic | 5-7,2-6 |
| ITF Women Irapuato Qual | 2018/03/11 18:20 | Nika Kukharchuk v Claudia Coppola | 6-1,7-5 |
| ITF Women Sao Paulo Qual | 2018/02/26 15:30 | Tara Moore v Nika Kukharchuk | 6-4,6-7,7-5 |
| ITF Women Sao Paulo Qual | 2018/02/25 16:00 | Juliana Silva De Carvalho v Nika Kukharchuk | 2-6,3-6 |
| ITF Women Sao Paulo Qual | 2018/02/24 15:30 | Andrea R Villarreal v Nika Kukharchuk | 2-6,4-6 |
| ITF Women Curitiba Qual | 2018/02/19 16:05 | Nika Kukharchuk v Alexa Ryngler | 1-6,6-7 |
| ITF Women Curitiba Qual | 2018/02/18 16:55 | Nika Kukharchuk v Madison Bourguignon | 6-2,7-6 |
| ITF Women Hammamet | 2018/02/08 10:20 | Nika Kukharchuk v Nastassja Burnett | 3-6,3-6 |