EN
2021
1/64-finals
| 1 | Cheongju | SMCE | 5 : 0 |
| 2 | Bye | Hwaseong | |
| 4 | Bye | Gangwon | |
| 5 | Seoul | Bye | |
| 7 | Seoul E-Land | Bye | |
| 8 | Majang | Songwol | 0 : 3 |
| 9 | Seoul United | Paju Citizen | 0 : 1 |
| 10 | Bye | Daejeon | |
| 12 | Bye | Suwon Bluewings | |
| 13 | Incheon | Bye | |
| 15 | Anyang | Bye | |
| 16 | Cheonan City | Incheon Namdong | 4 : 1 |
| 17 | Daegu | Bye | |
| 21 | Siheung Citizen | Ulsan Citizen | 2 : 0 |
| 22 | Bye | Gimhae | |
| 23 | Bucheon FC 1995 | Bye | |
| 24 | Together | Gimhae Jaemics | 0 : 2 |
| 25 | Phoenix | Pyeongtaek Citizen | 1 : 2 |
| 26 | Bye | Gimcheon Sangmu | |
| 28 | Bye | Jeju Utd | |
| 29 | Seongnam | Bye | |
| 31 | Busan | Bye | |
| 32 | 523 FC | Jeonju Citizen | 0 : 9 |
| 33 | Ulsan Hyundai | Bye | |
| 37 | Daejeon Korail | Hwajeong | 3 : 1 |
| 38 | Bye | Gyeongnam | |
| 39 | Mokpo | Bye | |
| 40 | Seoul Jungnang | Gimpo FC | 0 : 2 |
| 41 | Pocheon | Changwon | 1 : 0 |
| 42 | Bye | Gangneung | |
| 43 | Gyeongju KHNP | Bye | |
| 44 | Yangju | Jinju Citizen | 2 : 1 |
| 48 | Bye | Jeonbuk | |
| 49 | Chuncheon | Doksuri | 5 : 1 |
| 50 | Bye | Busan Kyotong | |
| 52 | Bye | Gwangju FC | |
| 53 | Suwon FC | Bye | |
| 55 | Jeonnam | Bye | |
| 56 | Bye | Cheongsol | |
| 57 | Chungju Citizen | Yangpyeong | 1 : 2 |
| 58 | Bye | Ansan Greeners | |
| 59 | Asan | Bye | |
| 60 | Goyang Citizen | Yeoju Citizen | 5 : 4 |
| 64 | Bye | Pohang |
1/32-finals
| 1 | Cheongju | Hwaseong | 2 : 1 |
| 2 | Bye | Gangwon | |
| 3 | Seoul | Bye | |
| 4 | Seoul E-Land | Songwol | 5 : 0 |
| 5 | Paju Citizen | Daejeon | 1 : 4 |
| 6 | Bye | Suwon Bluewings | |
| 7 | Incheon | Bye | |
| 8 | Anyang | Cheonan City | 5 : 1 |
| 9 | Daegu | Bye | |
| 11 | Siheung Citizen | Gimhae | 1 : 2 |
| 12 | Bucheon FC 1995 | Gimhae Jaemics | 3 : 1 |
| 13 | Pyeongtaek Citizen | Gimcheon Sangmu | 0 : 8 |
| 14 | Bye | Jeju Utd | |
| 15 | Seongnam | Bye | |
| 16 | Busan | Jeonju Citizen | 2 : 1 |
| 17 | Ulsan Hyundai | Bye | |
| 19 | Daejeon Korail | Gyeongnam | 0 : 1 |
| 20 | Mokpo | Gimpo FC | 1 : 0 |
| 21 | Pocheon | Gangneung | 1 : 0 |
| 22 | Gyeongju KHNP | Yangju | 0 : 1 |
| 24 | Bye | Jeonbuk | |
| 25 | Chuncheon | Busan Kyotong | 0 : 3 |
| 26 | Bye | Gwangju FC | |
| 27 | Suwon FC | Bye | |
| 28 | Jeonnam | Cheongsol | 11 : 0 |
| 29 | Yangpyeong | Ansan Greeners | 0 : 1 |
| 30 | Asan | Goyang Citizen | 3 : 1 |
| 32 | Bye | Pohang |
1/16-finals
| 1 | Cheongju | Gangwon | 1 : 2 |
| 2 | Seoul | Seoul E-Land | 0 : 1 |
| 3 | Daejeon | Suwon Bluewings | 1 : 2 |
| 4 | Incheon | Anyang | 0 : 3 |
| 5 | Daegu | Bye | |
| 6 | Gimhae | Bucheon FC 1995 | 2 : 1 |
| 7 | Gimcheon Sangmu | Jeju Utd | 1 : 0 |
| 8 | Seongnam | Busan | 1 : 0 |
| 9 | Ulsan Hyundai | Bye | |
| 10 | Gyeongnam | Mokpo | 3 : 1 |
| 11 | Pocheon | Yangju | 0 : 2 |
| 12 | Bye | Jeonbuk | |
| 13 | Busan Kyotong | Gwangju FC | 3 : 2 |
| 14 | Suwon FC | Jeonnam | 1 : 2 |
| 15 | Ansan Greeners | Asan | 0 : 1 |
| 16 | Bye | Pohang |
1/8-finals
| 1 | Gangwon | Seoul E-Land | 2 : 0 |
| 2 | Suwon Bluewings | Anyang | 1 : 0 |
| 3 | Daegu | Gimhae | 2 : 0 |
| 4 | Gimcheon Sangmu | Seongnam | 3 : 2 |
| 5 | Ulsan Hyundai | Gyeongnam | 3 : 0 |
| 6 | Yangju | Jeonbuk | 1 : 0 |
| 7 | Busan Kyotong | Jeonnam | 2 : 3 |
| 8 | Asan | Pohang | 1 : 3 |
Quarter-finals
| 1 | Gangwon | Suwon Bluewings | 2 : 0 |
| 2 | Daegu | Gimcheon Sangmu | 2 : 1 |
| 3 | Ulsan Hyundai | Yangju | 2 : 0 |
| 4 | Jeonnam | Pohang | 1 : 0 |
Semi-finals
| 1 | Gangwon | Daegu | 0 : 1 |
| 2 | Ulsan Hyundai | Jeonnam | 1 : 2 |
Final
| 1 | Daegu | Jeonnam | 3 : 4, 1 : 0 |
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