| ITF Women Gyeongsan Qual | 2018/06/10 01:00 | Τζι Μιν Παρκ v Sung Hee Kim | 2-6,3-6 |
| ITF Women Sangju Qual | 2018/06/05 04:00 | Jin Ju Lee v Sung Hee Kim | 2-6,6-4,6-3 |
| ITF Women Sangju Qual | 2018/06/04 05:00 | Sung Hee Kim v Ai Kamiyoshihara | 6-3,6-3 |
| ITF Women Sangju Qual | 2018/06/03 03:30 | Εουντζί Ο v Sung Hee Kim | 7-5,5-7,4-6 |
| ITF Women Changwon | 2018/05/23 01:00 | Risa Ozaki v Sung Hee Kim | 6-0,6-1 |
| ITF Women Incheon Qual | 2018/05/13 01:00 | Jin Yoo v Sung Hee Kim | 6-1,7-5 |
| ITF Women Goyang Qual | 2018/05/07 02:30 | Sung Hee Kim v Σο-Ρα Λι | 5-7,2-6 |
| ITF Women Goyang Qual | 2018/05/07 00:30 | Sung Hee Kim v Eunseo Kim | 6-0,6-1 |
| ITF Women Sangju Qual | 2018/06/04 05:00 | Ju-Eun Kim v Seohyeon Kim | 6-3,7-5 |
| ITF Women Changwon Qual | 2018/05/20 04:30 | Nadja Gilchrist v Seohyeon Kim | 6-2,6-3 |
| ITF Women Yeongwol | 2017/09/03 01:00 | Ντα Χίε Κιμ v Seohyeon Kim | 6-3,6-2 |
| ITF Women Yeongwol | 2016/09/06 01:00 | Su Yeon Chun v Seohyeon Kim | 6-1,6-3 |
| ITF Women Yeongwol | 2016/09/05 01:00 | Seon Young Um v Seohyeon Kim | 3-6,4-6 |
| ITF Women Yeongwol | 2016/09/04 01:00 | Seohyeon Kim v Jeongyun Lee | 6-1,6-0 |
| ITF Women Yeongwol | 2016/08/29 01:00 | Seohyeon Kim v Se-Hyun Kim | 4-6,6-1,4-6 |