Stadium: C Round: 62
| Mildura, Simples W-WITF-AUS-04A | 2018/03/06 01:05 | Maddison Inglis v Sawayanagi, Riko | 6-0,6-2 |
| ITF Women Perth Qual | 2018/02/19 05:05 | Sawayanagi, Riko v Lulu Sun | 2-6,3-6 |
| ITF Women Perth Qual | 2018/02/18 03:00 | Sawayanagi, Riko v Ueda, Ramu | 6-3,7-5 |
| Perth, Simples W-WITF-AUS-05A | 2018/02/15 02:00 | Sawayanagi, Riko v Minokoshi, Mai | 1-6,1-6 |
| ITF Women Perth Qual | 2018/02/12 04:35 | Sawayanagi, Riko v Chernyshova, Maryna | 6-4,6-2 |
| ITF Women Perth Qual | 2018/02/11 02:00 | Sawayanagi, Riko v James, Elizabeth | 6-1,6-1 |
| Launceston, Qualifications Simples W-WITF-AUS-02B | 2018/02/06 23:00 | Alexandra Bozovic v Sawayanagi, Riko | 6-0,6-3 |
| ITF Women Launceston Qual | 2018/02/04 23:00 | Sawayanagi, Riko v Nagi Hanatani | 6-4,6-3 |
| ITF Women Perth Qual | 2018/02/17 05:00 | Himari Sato v Moore, Jessica | 6-7,0-6 |
| Perth, Simples W-WITF-AUS-05A | 2018/02/14 02:00 | Himari Sato v Perez, Ellen | 1-6,4-6 |
| ITF Women Perth Qual | 2018/02/12 02:00 | Inoue, Miyabi v Himari Sato | 3-6,6-2,4-6 |
| ITF Women Perth Qual | 2018/02/11 02:00 | Himari Sato v Ueda, Ramu | 6-3,5-7,6-3 |
| ITF Women Perth Qual | 2018/02/10 01:00 | Mcbryde, Renee v Himari Sato | 4-6,6-4,6-7 |
| Launceston, Qualifications Simples W-WITF-AUS-02B | 2018/02/07 01:35 | Himari Sato v Muhammad, Asia | 3-6,1-6 |
| ITF Women Launceston Qual | 2018/02/05 00:25 | Himari Sato v Elie, Jennifer | 6-1,3-6,6-3 |
| ITF Women Launceston Qual | 2018/02/04 02:00 | Tomic, Sara v Himari Sato | 2-6,2-6 |