| K League 1 2021 Championship - Matches comme assistant | ||||
| 31.10.2021 | Daegu FC | - | Jeju United | 0:5 |
| 21.11.2021 | Suwon FC | - | Jeonbuk FC | 3:2 |
| 05.12.2021 | Suwon FC | - | Suwon Bluewings | 2:0 |
| K League 1 2021 Championship - Matches comme assistant | ||||
| 31.10.2021 | Daegu FC | - | Jeju United | 0:5 |
| 21.11.2021 | Suwon FC | - | Jeonbuk FC | 3:2 |
| 05.12.2021 | Suwon FC | - | Suwon Bluewings | 2:0 |
| Nom complet: | Joo-kyung Sung |
| Né le: | |
| Né à: |
Corée du Sud |
| Nationalité: |
Corée du Sud |