Stadium: Court 3 Round: 25 Ground: Hardcourt outdoor
| ITF Women Makinohara | 2016/10/13 00:30 | Riko Sawayanagi v Miharu Imanishi | 6-2,6-4 |
| Australian Open Women Qual | 2018/01/13 09:55 | Miharu Imanishi v Marie Bouzkova | 4-6,1-6 |
| Australian Open Women Qual | 2018/01/11 03:35 | Risa Ozaki v Miharu Imanishi | 7-5,6-7,1-6 |
| WTA Auckland Qual | 2017/12/30 00:00 | Miharu Imanishi v Miyu Kato | 1-6,7-6,1-6 |
| Australian Open Women WC Qual | 2017/11/30 02:00 | Miharu Imanishi v Xinyu Wang | 2-6,7-5,1-6 |
| Australian Open Women WC | 2017/11/30 02:00 | Miharu Imanishi v Xin Wang | 2-6,7-5,1-5 |
| WTA Honolulu | 2017/11/24 22:10 | Miharu Imanishi v Su Jeong Jang | 1-6,3-6 |
| WTA Honolulu | 2017/11/22 20:00 | Allie Kiick v Miharu Imanishi | 6-2,5-7,3-6 |
| WTA Honolulu | 2017/11/20 20:00 | Miharu Imanishi v Ayano Shimizu | 6-2,6-2 |
| ITF Women Perth Qual | 2018/02/12 04:35 | Riko Sawayanagi v Maryna Chernyshova | 6-4,6-2 |
| ITF Women Perth Qual | 2018/02/11 02:00 | Riko Sawayanagi v Elizabeth James | 6-1,6-1 |
| ITF Women Launceston | 2018/02/06 23:00 | Alexandra Bozovic v Riko Sawayanagi | 6-0,6-3 |
| ITF Women Launceston Qual | 2018/02/04 23:00 | Riko Sawayanagi v Nagi Hanatani | 6-4,6-3 |
| 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 |