Stadium: Court 3 Round: 28
| ITF Korea F2 | 2018/06/15 03:00 | Jae Hwan Kim v Ju-Hae Moon | 6-4,6-1 |
| ITF Korea F2 | 2018/06/14 02:30 | Cheng-Yu Yu v Jae Hwan Kim | 1-6,5-7 |
| ITF Korea F2 | 2018/06/13 03:30 | Jae Hwan Kim v Sang-Woo Noh | 6-2,6-3 |
| ITF Korea F2 | 2018/06/11 03:30 | Jae Hwan Kim v Sung Jun Park | 6-1,6-2 |
| ITF Korea F2 | 2018/06/10 02:00 | Jae Hwan Kim v Seung-Hun Shin | 6-2,6-2 |
| ITF Korea F1 | 2018/06/07 01:00 | Jae Hwan Kim v Jeamoon Lee | 6-4,2-6,4-6 |
| ITF Korea F1 | 2018/06/06 02:50 | Young Seok Kim v Jae Hwan Kim | 4-6,4-6 |
| Challenger Busan Qual | 2018/05/12 01:00 | Jae Hwan Kim v Guillermo Olaso | 0-6,5-7 |
| ITF Korea F2 | 2018/06/15 03:20 | Chan-Yeong Oh v Yunseong Chung | 6-7,6-3,4-6 |
| ITF Korea F2 | 2018/06/14 03:45 | Soichiro Moritani v Yunseong Chung | 6-7,0-6 |
| ITF Korea F2 | 2018/06/12 01:00 | Clement Larriere v Yunseong Chung | 3-6,4-6 |
| ITF China F7 | 2018/06/01 06:15 | Xin Gao v Yunseong Chung | 6-0,6-7,6-3 |
| ITF China F7 | 2018/05/31 04:30 | Chien Hsun Lo v Yunseong Chung | 2-6,7-5,5-7 |
| ITF China F7 | 2018/05/29 05:30 | Zhenxiong Dong v Yunseong Chung | 2-6,1-6 |
| Challenger Busan | 2018/05/15 03:25 | Matthew Ebden v Yunseong Chung | 6-3,3-6,6-3 |
| Challenger Busan Qual | 2018/05/14 02:00 | Yunseong Chung v Luke Saville | 6-7,7-6,6-0 |