| 6. Ronde | 20.03.2021 | Jeju United | - | Gwangju FC | 1:1 | ||||
| 7. Ronde | 04.04.2021 | Suwon FC | - | Jeju United | 2:1 | ||||
| 9. Ronde | 11.04.2021 | Jeju United | - | Suwon Bluewings | 2:1 | ||||
| 10. Ronde | 17.04.2021 | Incheon United | - | Jeju United | 0:3 |  |
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| 11. Ronde | 21.04.2021 | Jeju United | - | FC Seoul | 2:1 | ||||
| 12. Ronde | 24.04.2021 | Pohang Steelers | - | Jeju United | 0:0 | ||||
| 14. Ronde | 08.05.2021 | Jeju United | - | Suwon FC | 1:3 |  |
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| 15. Ronde | 12.05.2021 | Suwon Bluewings | - | Jeju United | 3:2 |
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