| 6. Jornada | 21.03.2021 | Seongnam FC | - | Pohang Steelers | 2:1 |  |
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| 7. Jornada | 03.04.2021 | Seongnam FC | - | Ulsan Hyundai FC | 0:1 | ||||
| 8. Jornada | 06.04.2021 | Daegu FC | - | Seongnam FC | 0:0 | ||||
| 9. Jornada | 10.04.2021 | Seongnam FC | - | Gwangju FC | 2:0 | ||||
| 10. Jornada | 18.04.2021 | Jeonbuk FC | - | Seongnam FC | 1:0 | ||||
| 11. Jornada | 21.04.2021 | Seongnam FC | - | Incheon United | 1:3 | ||||
| 18. Jornada | 22.05.2021 | Jeju United | - | Seongnam FC | 2:2 | ||||
| 15. Jornada | 06.06.2021 | Seongnam FC | - | Jeonbuk FC | 1:5 | ||||
| 14. Jornada | 20.06.2021 | Ulsan Hyundai FC | - | Seongnam FC | 2:2 | ||||
| 16. Jornada | 04.08.2021 | Pohang Steelers | - | Seongnam FC | 1:0 | ||||
| 23. Jornada | 07.08.2021 | Seongnam FC | - | Pohang Steelers | 1:0 | ||||
| 26. Jornada | 21.08.2021 | Seongnam FC | - | Jeonbuk FC | 0:0 | ||||
| 27. Jornada | 24.08.2021 | Gwangju FC | - | Seongnam FC | 2:0 |  |
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| 28. Jornada | 28.08.2021 | Daegu FC | - | Seongnam FC | 3:1 | ||||
| 21. Jornada | 04.09.2021 | Seongnam FC | - | Daegu FC | 0:0 | ||||
| 29. Jornada | 12.09.2021 | Seongnam FC | - | FC Seoul | 1:1 | ||||
| 30. Jornada | 19.09.2021 | Incheon United | - | Seongnam FC | 0:1 | ||||
| 24. Jornada | 24.10.2021 | Seongnam FC | - | Ulsan Hyundai FC | 2:1 |
Corea del Sur