| ITF Women Sangju Qual | 2018/06/03 02:00 | Jeong, Jooyeon v Sim, Mi Seong | 0-6,4-6 |
| Changwon, Singles Qualifying W-WITF-KOR-01A | 2018/05/20 04:30 | Kim, S. v Jeong, Jooyeon | 6-1,6-2 |
| ITF Women Incheon Qual | 2018/05/13 02:00 | Park, Eunyeong v Jeong, Jooyeon | 6-2,6-2 |
| ITF Women Goyang Qual | 2018/05/06 05:15 | Kim, Hae-Sung v Jeong, Jooyeon | 6-1,6-0 |
| ITF Women Yeongwol | 2017/09/03 02:00 | Lee, Han-Bit v Jeong, Jooyeon | 6-3,6-2 |
| ITF Women Gimcheon | 2017/06/11 02:00 | Lee, Dami v Jeong, Jooyeon | 6-1,6-1 |
| ITF Women Goyang Qual | 2017/05/21 01:00 | Zhang, Ling v Jeong, Jooyeon | 6-0,6-0 |
| ITF Women Incheon Qual | 2017/05/14 02:00 | Jeong, Jooyeon v Nor, Hoyeon | 1-6,1-6 |
| ITF Women Sangju Qual | 2018/06/05 01:00 | Ho Ching Wu v Yoon, Sujin | 6-1,6-0 |
| ITF Women Sangju Qual | 2018/06/03 01:00 | Yoon, Sujin v Yoon, So-Hee | 2-6,6-3,6-2 |
| ITF Women Incheon Qual | 2018/05/13 02:00 | Yoon, Sujin v Dabin Kim | 3-6,6-0,4-6 |
| ITF Women Goyang Qual | 2018/05/06 05:15 | Yoon, Sujin v Lee, Hye-Jin | 2-6,6-3,5-7 |
| ITF Women Yeongwol | 2017/09/03 03:00 | Yoon, Sujin v Kamiyoshihara, Ai | 5-7,2-6 |
| ITF Women Yeongwol | 2017/08/28 01:00 | Yoon, Sujin v Kim, Da Hye | 1-6,3-6 |
| ITF Women Gimcheon | 2017/06/11 02:00 | Yoon, Sujin v Jang, Eun SE | 3-6,7-5,0-6 |
| ITF Women Gimcheon | 2017/06/06 01:00 | Lee, Jin Ju v Yoon, Sujin | 6-2,6-2 |