Stadium: Court 3 Round: 54 Ground: Hardcourt outdoor
| ITF Women Toyota | 2017/11/16 04:00 | Mihaela Buzarnescu v Riko Sawayanagi | 6-2,6-1 |
| ITF Women Toyota | 2017/11/15 01:00 | Kyoka Okamura v Riko Sawayanagi | 6-7,5-7 |
| ITF Women Tokyo | 2017/11/08 04:00 | Tori Kinard v Riko Sawayanagi | 7-6,6-4 |
| ITF Women Liuzhou | 2017/10/27 03:00 | Riko Sawayanagi v Xinyun Han | 4-6,6-4,2-6 |
| ITF Women Liuzhou | 2017/10/24 03:20 | Riko Sawayanagi v Jia-Qi Kang | 6-4,6-2 |
| ITF Women Suzhou | 2017/10/19 05:10 | Jing-Jing Lu v Riko Sawayanagi | 6-1,6-4 |
| ITF Women Suzhou | 2017/10/18 06:00 | Riko Sawayanagi v Laura Robson | 3-6,6-4,7-5 |
| WTA Hong Kong Qual | 2017/10/07 02:00 | Alexa Guarachi v Riko Sawayanagi | 6-4,6-3 |
| ITF Women Launceston Qual | 2018/02/04 00:55 | Alyssa Hibberd v Nagi Hanatani | 1-6,1-6 |
| ITF Women Burnie Qual | 2018/01/28 05:00 | Momoko Kobori v Nagi Hanatani | 6-0,6-4 |
| ITF Women Burnie Qual | 2018/01/28 01:45 | Nagi Hanatani v Alicia Smith | 7-5,6-4 |
| ITF Women Navi Mumbai | 2017/12/19 04:00 | Nagi Hanatani v Aliona Bolsova Zadoinov | 4-6,3-6 |
| ITF Women Navi Mumbai Qual | 2017/12/17 05:40 | Nagi Hanatani v Ksenia Palkina | 7-5,6-0 |
| ITF Women Navi Mumbai Qual | 2017/12/16 11:10 | Nagi Hanatani v Jessy Rompies | 6-4,6-2 |
| ITF Women Pune | 2017/12/11 04:30 | Katy Dunne v Nagi Hanatani | 6-3,6-1 |
| ITF Women Pune Qual | 2017/12/10 06:35 | Nagi Hanatani v Ksenia Palkina | 6-1,3-6,6-4 |