| Changwon, Singles Qualifying W-WITF-KOR-01A | 2018/05/21 01:00 | Йи, Хьююн v Kim, SE-Hyun | 6-1,1-6,6-0 |
| ITF Women Yeongwol | 2016/09/07 01:00 | Йи, Хьююн v Kim, SE-Hyun | 3-6,1-6 |
| ITF Women Yeongwol | 2016/09/01 01:00 | Kim, SE-Hyun v Йи, Хьююн | 5-7,3-6 |
| ITF Women Gyeongsan | 2018/06/12 02:30 | Kim, SE-Hyun v Кван Ян Нг | 6-1,6-3 |
| ITF Women Sangju | 2018/06/06 05:15 | Субин Парк v Kim, SE-Hyun | 1-6,6-3,6-2 |
| Changwon, Singles Qualifying W-WITF-KOR-01A | 2018/05/21 01:00 | Йи, Хьююн v Kim, SE-Hyun | 6-1,1-6,6-0 |
| ITF Women Incheon Qual | 2018/05/14 03:30 | Мэддисон Инглис v Kim, SE-Hyun | 6-3,5-7,6-2 |
| ITF Women Incheon Qual | 2018/05/13 03:30 | Kim, SE-Hyun v Lee, Seunghyun | 6-2,6-0 |
| ITF Women Goyang | 2018/05/08 05:05 | Эн Шуо Лианг v Kim, SE-Hyun | 3-6,7-5,6-0 |
| Sharm El Sheikh, Singles W-WITF-EGY-23A | 2017/11/16 16:05 | Kim, SE-Hyun v Джоди Анна Баррэйдж | 1-6,4-6 |
| Sharm El Sheikh, Singles W-WITF-EGY-23A | 2017/11/15 16:15 | Kim, SE-Hyun v Клаудиа Коппола | 6-0,6-3 |
| ITF Women Gyeongsan | 2018/06/13 05:15 | Йи, Хьююн v Хан, Сун-Хи | 6-4,6-2 |
| ITF Women Gyeongsan Qual | 2018/06/12 02:25 | Йи, Хьююн v Черри Ким | 6-1,6-4 |
| ITF Women Gyeongsan Qual | 2018/06/11 02:00 | Чжан, Юки v Йи, Хьююн | 2-6,3-6 |
| ITF Women Gyeongsan Qual | 2018/06/10 01:00 | Йи, Хьююн v Субин Парк | 6-2,6-1 |
| ITF Women Sangju | 2018/06/06 01:00 | Аяка Окуно v Йи, Хьююн | 6-3,6-3 |
| ITF Women Sangju Qual | 2018/06/05 02:05 | Йи, Хьююн v Sim, Mi Seong | 6-0,6-3 |
| ITF Women Sangju Qual | 2018/06/04 03:30 | Чихиро Такаяма v Йи, Хьююн | 2-6,1-6 |
| ITF Women Sangju Qual | 2018/06/03 02:00 | Йи, Хьююн v Еун Се Чан | 6-2,6-3 |