Schedule
| Date | Dead line | Home | Away | Group | Result | Points rule |
|---|---|---|---|---|---|---|
| 30/04/21 11:00 | 30/04/21 11:00 | K1 FC Seoul | K1 Seongnam FC | K1 | 2-2 | 2 - 4 points |
| 01/05/21 05:00 | 01/05/21 05:00 | K1 Suwon FC | K1 Daegu FC | K1 | 2-4 | 2 - 4 points |
| 01/05/21 05:00 | 01/05/21 05:00 | K1 Suwon Bluewings | K1 Pohang Steelers | K1 | 1-1 | 2 - 4 points |
| 01/05/21 05:00 | 01/05/21 05:00 | K1 Ulsan Hyundai | K2 Gwangju FC | K1 | 2-0 | 2 - 4 points |
| 01/05/21 05:00 | 01/05/21 05:00 | K1 Jeonbuk Motors | K1 Jeju United | K1 | 1-1 | 2 - 4 points |
| 01/05/21 05:00 | 01/05/21 05:00 | K1 Incheon United | K1 Gangwon FC | K1 | 1-0 | 2 - 4 points |
| 01/05/21 05:00 | 01/05/21 05:00 | K2 Jeonnam Dragons | K2 Anyang | K2 | 0-1 | 2 - 4 points |
| 01/05/21 05:00 | 01/05/21 05:00 | K2 Daejeon Hana Citizens | K2 Chungnam Asan | K2 | 1-1 | 2 - 4 points |
| 01/05/21 05:00 | 01/05/21 05:00 | K1 Gimcheon Sangmu | K2 Gyeongnam FC | K2 | 1-2 | 2 - 4 points |
| 01/05/21 05:00 | 01/05/21 05:00 | K2 Bucheon | K2 Busan | K2 | 0-2 | 2 - 4 points |
| 01/05/21 05:00 | 01/05/21 05:00 | K2 Seoul Eland | K2 Ansan Greeners | K2 | 1-0 | 2 - 4 points |
| 01/05/21 05:00 | 01/05/21 05:00 | K4 Chuncheon FC | K4 Geoje Citizen | K4 | 0-2 | 2 - 4 points |