| 1. Jornada | 01.03.2021 | Ulsan Hyundai FC | - | Gangwon FC | 5:0 |  |
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| 2. Jornada | 06.03.2021 | Gwangju FC | - | Ulsan Hyundai FC | 0:1 | ||||
| 3. Jornada | 09.03.2021 | Ulsan Hyundai FC | - | Incheon United | 3:1 | |
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| 4. Jornada | 13.03.2021 | Pohang Steelers | - | Ulsan Hyundai FC | 1:1 | ||||
| 5. Jornada | 16.03.2021 | Ulsan Hyundai FC | - | Jeju United | 0:0 | ||||
| 6. Jornada | 21.03.2021 | Daegu FC | - | Ulsan Hyundai FC | 2:1 | ||||
| 8. Jornada | 07.04.2021 | Ulsan Hyundai FC | - | FC Seoul | 3:2 | ||||
| 9. Jornada | 11.04.2021 | Suwon FC | - | Ulsan Hyundai FC | 0:1 | |
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| 10. Jornada | 18.04.2021 | Suwon Bluewings | - | Ulsan Hyundai FC | 3:0 | ||||
| 11. Jornada | 21.04.2021 | Ulsan Hyundai FC | - | Jeonbuk FC | 0:0 | ||||
| 12. Jornada | 25.04.2021 | Incheon United | - | Ulsan Hyundai FC | 0:0 | ||||
| 13. Jornada | 01.05.2021 | Ulsan Hyundai FC | - | Gwangju FC | 2:0 | ||||
| 18. Jornada | 22.05.2021 | Ulsan Hyundai FC | - | Pohang Steelers | 1:0 | ||||
| 19. Jornada | 29.05.2021 | Jeju United | - | Ulsan Hyundai FC | 1:2 | ||||
| 14. Jornada | 20.06.2021 | Ulsan Hyundai FC | - | Seongnam FC | 2:2 |
Corea del Sur