| K League 1 2018 - Appearances as Assistant | ||||
| 20/10/2018 | Jeju United | - | FC Seoul | 1:0 |
| K League 1 2018 - Appearances as Assistant | ||||
| 20/10/2018 | Jeju United | - | FC Seoul | 1:0 |
| Complete name: | Deok-hyo Sung |
| Born: | |
| Place of birth: |
South Korea |
| Nationality: |
South Korea |