Stadium: Court 5 Round: 26
| ITF Women Yeongwol | 2018/09/05 03:10 | Lee, SE Jin v Hong, Seung-Yeon | 3-6,3-6 |
| ITF Women Gimcheon | 2018/08/17 01:00 | Hong, Seung-Yeon v Joanna Garland | 5-7,1-6 |
| ITF Women Gimcheon | 2018/08/16 01:00 | Hong, Seung-Yeon v Jeong, Yeong Won | 7-5,6-4 |
| ITF Women Gimcheon | 2018/08/15 03:00 | Hong, Seung-Yeon v Kamiyoshihara, Ai | 6-3,6-0 |
| ITF Women Tianjin Qual | 2018/07/08 03:10 | Beatrice Gumulya v Hong, Seung-Yeon | 6-0,7-6 |
| ITF Women Naiman | 2018/07/04 04:10 | Meiling Wang v Hong, Seung-Yeon | 6-4,6-0 |
| ITF Women Naiman | 2018/07/02 03:55 | Hong, Seung-Yeon v Ng, Kwan Yau | 6-3,7-5 |
| ITF Women Naiman Qual | 2018/07/01 04:05 | Lu, Jiaxi v Hong, Seung-Yeon | 5-7,6-4,1-6 |
| ITF Women Yeongwol | 2018/09/05 04:45 | Kim, Dainhee v Jeong, Sunam | 1-6,1-6 |
| ITF Women Yeongwol | 2018/08/29 04:45 | Sohyun Park v Jeong, Sunam | 1-6,6-3,6-3 |
| Nonthaburi, Simples W-WITF-THA-09A | 2018/07/09 02:00 | Ozaki, Risa v Jeong, Sunam | 4-6,6-4,6-4 |
| ITF Women Nonthaburi Qual | 2018/07/08 03:20 | Jeong, Sunam v Sawasdee, Watsachol | 6-1,7-5 |
| ITF Women Nonthaburi Qual | 2018/07/07 05:40 | Jeong, Sunam v Vasuratna, Pat | 6-1,6-0 |
| ITF Women Daegu | 2018/06/21 01:00 | Jeong, Sunam v Doi, Misaki | 3-6,1-6 |
| ITF Women Daegu | 2018/06/20 02:30 | Jeong, Sunam v Yanni Liu | 6-3,7-6 |
| ITF Women Gyeongsan | 2018/06/15 03:45 | Ho Ching Wu v Jeong, Sunam | 6-2,4-6,6-3 |