Schedule
| Date | Dead line | Home | Away | Group | Result | Points rule |
|---|---|---|---|---|---|---|
| 05/05/21 05:00 | 05/05/21 05:00 | K1 Gimcheon Sangmu | K2 Busan | K2 | 1-0 | 2 - 4 points |
| 05/05/21 05:00 | 05/05/21 05:00 | K2 Daejeon Hana Citizens | K2 Jeonnam Dragons | K2 | 1-1 | 2 - 4 points |
| 05/05/21 05:00 | 05/05/21 05:00 | K2 Seoul Eland | K2 Gyeongnam FC | K2 | 1-1 | 2 - 4 points |
| 05/05/21 05:00 | 05/05/21 05:00 | K2 Chungnam Asan | K2 Ansan Greeners | K2 | 0-2 | 2 - 4 points |
| 05/05/21 05:00 | 05/05/21 05:00 | K2 Anyang | K2 Bucheon | K2 | 2-0 | 2 - 4 points |
| 05/05/21 05:00 | 05/05/21 05:00 | K3 Dangjin Citizen | K3 Siheung Citizen | K4 | 1-0 | 2 - 4 points |