Stadium: S Round: 54
| 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 Midland Qual | 2018/01/30 15:00 | Ann Li v Paula Cristina Goncalves | 6-4,6-3 |
| ITF Women Midland Qual | 2018/01/29 15:00 | Paula Cristina Goncalves v Maria Mateas | 6-3,6-2 |
| ITF Women Midland Qual | 2018/01/28 16:00 | Paula Cristina Goncalves v Sanaz Marand | 4-6,7-6,7-6 |
| ITF Women Wesley Chapel | 2018/01/24 16:15 | Paula Cristina Goncalves v Irina Maria Bara | 4-6,1-6 |
| ITF Women Wesley Chapel Qual | 2018/01/23 16:15 | Quinn Gleason v Paula Cristina Goncalves | 6-3,1-6,4-6 |
| ITF Women Wesley Chapel Qual | 2018/01/22 16:00 | Jada Robinson v Paula Cristina Goncalves | 5-7,3-6 |
| ITF Women Wesley Chapel Qual | 2018/01/21 16:30 | Ronit Yurovsky v Paula Cristina Goncalves | 3-6,1-6 |
| ITF Women Orlando Qual | 2018/01/14 15:00 | Olga Danilovic v Paula Cristina Goncalves | 7-5,7-5 |