Stadium: Court A Round: 44
| ITF Korea F6 | 2018/08/31 06:00 | Lucas Catarina v Yeongseok Jeong | 3-6,6-2,6-2 |
| ITF Korea F6 | 2018/08/30 04:50 | Chan-Yeong Oh v Yeongseok Jeong | 6-2,4-6,2-6 |
| ITF Korea F6 | 2018/08/28 02:00 | Yeongseok Jeong v Young-Hoon Jeong | 7-5,7-6 |
| ITF Korea F5 | 2018/08/21 03:00 | Hong Chung v Yeongseok Jeong | 6-1,7-6 |
| Challenger Gwangju | 2018/08/13 06:30 | Yeongseok Jeong v Rubin Statham | 4-6,0-6 |
| ITF Korea F3 | 2018/06/19 08:30 | Yeongseok Jeong v Sanhui Shin | 6-4,5-7,2-6 |
| Challenger Gimcheon Qual | 2018/05/05 04:40 | Yeongseok Jeong v Tung-Lin Wu | 1-6,2-6 |
| ITF Indonesia F8 Qual | 2017/11/25 05:00 | Ken Onoda v Yeongseok Jeong | 2-6,6-1,6-2 |
| Challenger Shenzhen 2 | 2018/10/27 07:30 | Saketh Myneni v Natthasith Kunsuwan | 6-4,7-5 |
| ITF Thailand F6 | 2018/10/08 02:30 | Natthasith Kunsuwan v Daisuke Sumizawa | 2-6,2-6 |
| ITF Thailand F6 | 2018/10/06 05:30 | Natthasith Kunsuwan v Daniel Kossek | 6-4,6-7,6-4 |
| ITF Thailand F5 | 2018/09/30 02:30 | Seung-Hun Shin v Natthasith Kunsuwan | 7-6,6-1 |
| ITF Thailand F5 | 2018/09/29 02:30 | Bingyu Yu v Natthasith Kunsuwan | 6-3,3-6,3-6 |
| ITF Thailand F4 | 2018/09/24 02:30 | Natthasith Kunsuwan v Tsung-Hao Huang | 6-7,5-7 |
| ITF Thailand F3 | 2018/09/04 07:45 | Soichiro Moritani v Natthasith Kunsuwan | 6-2,6-2 |
| ITF Thailand F2 | 2018/08/28 02:00 | Natthasith Kunsuwan v Dayne Kelly | 3-6,1-6 |