Stadium: Centre Court Round: 54 Ground: Hardcourt outdoor
| ITF W25 Incheon | 2019/05/27 03:00 | Freya Christie v Youn, Eunseo | 4-6,6-1,4-10 |
| ITF Women Yeongwol | 2018/09/02 01:00 | Jang, Eun SE v Youn, Eunseo | 6-2,3-6,6-2 |
| ITF Women Yeongwol | 2018/08/29 05:55 | Eunhye Lee v Youn, Eunseo | 6-3,6-2 |
| ITF Women Gimcheon | 2018/08/20 02:00 | Youn, Eunseo v Ashmitha Easwaramurthi | 0-6,0-6 |
| ITF Women Yeongwol | 2017/09/04 02:00 | Youn, Eunseo v Lee, Jeongyun | 0-6,0-6 |
| ITF Women Yeongwol | 2017/08/27 02:00 | Bae, Do Hee v Youn, Eunseo | 6-3,6-0 |
| ITF W25 Incheon | 2019/05/27 03:30 | Laguza, Anna v Okuno, Ayaka | 4-6,6-0,8-10 |
| Karuizawa, Singles W-ITF-JPN-12A | 2019/05/21 05:40 | Matsumoto, Ari v Okuno, Ayaka | 4-6,6-2,10-7 |
| Karuizawa, Singles W-ITF-JPN-12A | 2019/05/20 03:00 | Hisamatsu, Shiho v Okuno, Ayaka | 4-6,2-6 |
| Kurume, Singles W-ITF-JPN-11A | 2019/05/13 01:55 | Alexandra Bozovic v Okuno, Ayaka | 6-3,6-3 |
| Fukuoka, Singles W-ITF-JPN-10A | 2019/05/06 03:05 | Okuno, Ayaka v Leonie Kung | 3-6,3-6 |
| Charlottesville, Simples W-ITF-USA-13A | 2019/04/23 16:20 | Emily Fanning v Okuno, Ayaka | 4-6,6-2,10-3 |
| Charlottesville, Simples W-ITF-USA-13A | 2019/04/22 14:00 | Cavero Roeper, Ana Jocelijn v Okuno, Ayaka | 0-6,2-6 |
| Osaka, Singles W-ITF-JPN-02A | 2019/04/08 01:00 | Okuno, Ayaka v Ueda, Ramu | 3-6,2-6 |