Estadio: Court 4 Round: 26 Ground: Hardcourt outdoor
| ITF M15 Daegu | 2019/06/05 04:50 | Seong-Gook Oh v Sung Jun Park | 6-4,6-7,7-5 |
| ITF Vietnam F5 | 2018/11/01 04:30 | Filip Bergevi v Seong-Gook Oh | 6-7,6-2,6-2 |
| ITF Vietnam F5 | 2018/10/31 03:00 | Seong-Gook Oh v Grigoriy Lomakin | 6-3,2-6,6-4 |
| ITF Vietnam F4 | 2018/10/23 03:40 | Rio Noguchi v Seong-Gook Oh | 6-3,6-2 |
| ITF Corea del Sur F6 | 2018/09/01 04:00 | Seong-Gook Oh v Min-Kyu Song | 1-6,6-7 |
| ITF Corea del Sur F6 | 2018/08/31 03:00 | Young Seok Kim v Seong-Gook Oh | 5-7,6-2,4-6 |
| ITF Corea del Sur F6 | 2018/08/30 03:00 | Oh-Hee Kwon v Seong-Gook Oh | 4-6,1-6 |
| ITF Corea del Sur F6 | 2018/08/28 02:00 | William Ma v Seong-Gook Oh | 6-4,2-6,0-6 |
| ITF M15 Daegu | 2019/06/05 02:55 | Yeongseok Jeong v Dominik Palan | 2-6,6-3,6-0 |
| ITF M15 El Cairo | 2019/05/02 11:50 | Marko Tepavac v Yeongseok Jeong | 6-3,6-1 |
| ITF M15 El Cairo | 2019/05/01 11:00 | Yeongseok Jeong v Vignesh Peranamallur | 6-3,6-1 |
| ITF M15 El Cairo | 2019/04/23 08:00 | Yeongseok Jeong v Albert Alcaraz Ivorra | 5-7,3-6 |
| ITF Turquía F38 | 2018/11/29 07:00 | Jeroen Vanneste v Yeongseok Jeong | 3-6,6-4,6-3 |
| ITF Turquía F38 | 2018/11/28 08:55 | Vladislav Melnic v Yeongseok Jeong | 6-4,3-6,2-6 |
| ITF Turquía F38 | 2018/11/26 07:40 | Yeongseok Jeong v Senne Braun | 6-4,6-0 |
| ITF Turquía F27 | 2018/11/21 07:00 | Dejan Katic v Yeongseok Jeong | 6-2,6-1 |