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| 08.08.2018 | 12:00 | Jeonnam Dragons | - | Chuncheon FC | 2:1 (1:0) | |
| 12:00 | Asan Mugunghwa FC | - | Jeonbuk FC | 2:1 (0:1) | ||
| 12:00 | Busan IPark | - | Ulsan Hyundai FC | 0:2 (0:0) | ||
| 12:00 | Cheonan City FC | - | Suwon Bluewings | 2:4 (1:0, 2:2) n.V. | ||
| 12:30 | Daegu FC | - | Yangpyeong FC | 8:0 (2:0) | ||
| 12:30 | Incheon United | - | Mokpo City FC | 1:2 (1:0) | ||
| 12:30 | Gimhae City FC | - | Gyeongju KHNP | 1:0 (0:0) | ||
| 12:30 | FC Seoul | - | Jeju United | 1:2 (0:1) |
