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| 27.03.2021 | 06:00 | Gyeongju KHNP | - | Yangju Citizen | 3:4 (0:0, 0:0, 0:0) tab | |
| 06:00 | FC Anyang | - | Cheonan City FC | 5:1 (3:0) | ||
| 06:00 | Bucheon FC 1995 | - | Gimhae Jaemics | 3:1 (2:1) | ||
| 06:00 | Busan IPark | - | Jeonju Citizen | 2:1 (0:0, 1:1) ap | ||
| 08:00 | Chungnam Asan FC | - | Goyang Citizen FC | 3:1 (1:0) | ||
| 08:00 | Seoul E-Land FC | - | Songwol FC | 5:0 (2:0) | ||
| 08:00 | FC Mokpo | - | Gimpo FC | 1:0 (1:0) | ||
| 08:00 | Jeonnam Dragons | - | Cheongsol FC | 11:0 (5:0) | ||
| 28.03.2021 | 07:00 | Pocheon FC | - | Gangneung Citizen | 1:0 (1:0) | |
| 07:00 | Paju Citizen | - | Daejeon Hana Citizen | 1:4 (0:1, 1:1) ap | ||
| 07:00 | Gimhae FC | - | Siheung Citizen FC | 2:1 (0:0) | ||
| 07:00 | Gimcheon Sangmu | - | Pyeongtaek Citizen FC | 8:0 (3:0) | ||
| 09:00 | Ansan Greeners | - | Yangpyeong FC | 1:0 (0:0) | ||
| 09:00 | Cheongju FC | - | Hwaseong FC | 5:4 (0:0, 1:1, 1:1) tab | ||
| 09:00 | Daejeon Korail | - | Gyeongnam FC | 0:1 (0:1) | ||
| 09:00 | Chuncheon FC | - | Busan Transportation Corporation | 0:3 (0:3) |
