Stadium: Stadium (Ct 9) Round: 62
| ITF Women Tel Aviv | 2018/03/18 12:00 | Closs, Mary v Danielle Daley | 2-6,4-6 |
| ITF Women Ramat Hasharon | 2018/03/12 07:30 | Barad Itzhaki, Tamara v Closs, Mary | 7-6,6-2 |
| ITF Women Solarino | 2018/03/07 10:40 | Dalila Spiteri v Closs, Mary | 6-7,6-4,6-3 |
| ITF Women Solarino | 2018/03/05 10:55 | Keens, Taro v Closs, Mary | 0-6,4-6 |
| ITF Women Solarino | 2018/02/27 11:00 | Closs, Mary v Tayisiya Morderger | 4-6,1-6 |
| ITF Women Solarino | 2018/02/25 10:30 | Closs, Mary v Giulia Paterno | 6-2,6-3 |
| ITF Women Solarino | 2018/02/20 12:30 | Rubini, Stefania v Closs, Mary | 6-2,6-3 |
| ITF Women Solarino | 2018/02/18 08:30 | Closs, Mary v Truden, Alessia | 6-1,6-2 |
| ITF Women Jackson Qual | 2018/04/01 19:30 | Okuda, Akiko v Marker, Lauren | 5-7,2-6 |
| ITF Women SJD Campos | 2018/03/15 17:30 | Okuda, Akiko v Petit, Stephanie Mariel | 1-6,2-6 |
| ITF Women SJD Campos | 2018/03/14 15:30 | Rebeca Pereira v Okuda, Akiko | 1-6,6-7 |
| ITF Women SJD Campos Qual | 2018/03/10 16:00 | Okuda, Akiko v Bosch, Maria Virginia | 6-2,6-0 |
| ITF Women Campinas Qual | 2018/03/05 13:00 | Lucero, Carla v Okuda, Akiko | 6-2,6-2 |
| ITF Women Campinas Qual | 2018/03/04 14:00 | Hudson, Althea v Okuda, Akiko | 0-6,0-6 |
| Sao Paulo, Singles Qualifying W-WITF-BRA-02A | 2018/02/24 12:00 | Okuda, Akiko v Giangreco Campiz, Camila | 2-6,6-3,4-6 |
| ITF Women Curitiba Qual | 2018/02/17 14:30 | Okuda, Akiko v Madison Bourguignon | 2-6,1-6 |