| ITF Women Sangju | 2018/06/06 01:00 | Okuno, Ayaka v Yea, Hyojung | 6-3,6-3 |
| Karuizawa, Singles W-WITF-JPN-10A | 2018/05/24 03:55 | Okuno, Ayaka v Myers, Abbie | 2-6,3-6 |
| Karuizawa, Singles W-WITF-JPN-10A | 2018/05/23 01:00 | Nefedova, Anastasia Evgenyevna v Okuno, Ayaka | 7-6,3-6,4-6 |
| ITF Women Kurume Qual | 2018/05/13 00:30 | Hondo, Sakura v Okuno, Ayaka | 6-7,6-4,7-6 |
| ITF Women Fukuoka Qual | 2018/05/06 07:05 | Inoue, Akari v Okuno, Ayaka | 6-1,6-4 |
| ITF Women Gifu Qual | 2018/04/29 03:10 | Mai Hontama v Okuno, Ayaka | 5-7,7-6,6-2 |
| Quanzhou, Qualifications Simples W-WITF-CHN-04B | 2018/04/21 05:45 | Gai, AO v Okuno, Ayaka | 6-3,6-4 |
| ITF Women Kashiwa Qual | 2018/04/01 03:00 | Okuno, Ayaka v Shiho Akita | 1-6,0-6 |
| ITF Women Sangju | 2018/06/06 05:15 | Subin Park v Kim, SE-Hyun | 1-6,6-3,6-2 |
| ITF Women Sangju Qual | 2018/06/03 01:00 | Kim, Sumin v Subin Park | 1-6,0-6 |
| Changwon, Singles Qualifying W-WITF-KOR-01A | 2018/05/21 03:30 | Liu, Chang v Subin Park | 6-1,4-6,6-3 |
| Changwon, Singles Qualifying W-WITF-KOR-01A | 2018/05/20 03:30 | Cheon, S. v Subin Park | 1-6,0-6 |
| ITF Women Incheon Qual | 2018/05/13 03:30 | Subin Park v Chan, Chin-Wei | 2-6,2-6 |
| ITF Women Yeongwol | 2017/09/05 01:00 | Sul, You-Na v Subin Park | 7-6,7-6 |
| ITF Women Yeongwol | 2017/09/03 01:00 | Subin Park v Shin, Hyeseo | 6-3,6-0 |
| ITF Women Yeongwol | 2017/08/30 01:00 | Nor, Hoyeon v Subin Park | 7-6,6-3 |