tour des 16
26.05.2021 12:00 Jeonbuk FC Jeonbuk FC - Yangju Citizen Yangju Citizen 9:10 (0:0, 0:0, 0:0) tab
26.05.2021 12:00 Suwon Bluewings Suwon Bluewings - FC Anyang FC Anyang 4:2 (0:0, 0:0, 0:0) tab
26.05.2021 12:00 Daegu FC Daegu FC - Gimhae FC Gimhae FC 2:0 (0:0)
26.05.2021 12:00 Gimcheon Sangmu Gimcheon Sangmu - Seongnam FC Seongnam FC 3:2 (0:1, 1:1) ap
26.05.2021 12:00 Chungnam Asan FC Chungnam Asan FC - Pohang Steelers Pohang Steelers 1:3 (1:1)
26.05.2021 12:00 Gangwon FC Gangwon FC - Seoul E-Land FC Seoul E-Land FC 2:0 (1:0)
26.05.2021 12:00 Ulsan Hyundai Ulsan Hyundai - Gyeongnam FC Gyeongnam FC 3:0 (1:0)
26.05.2021 12:00 Busan Transportation Corporation Busan Transportation Corporation - Jeonnam Dragons Jeonnam Dragons 3:5 (0:1, 2:2, 2:2) tab