| 28 Feb 21 | r01   | Suwon Samsung BluewingsSuwon Samsung | 1 - 0 | Gwangju FCGwangju FC |
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| 06 Mar 21 | r02 | Gwangju FCGwangju FC | 0 - 1 | Ulsan Hyundai FCUlsan Hyundai |
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| 10 Mar 21 | r03 | Daegu FCDaegu FC | 1 - 4 | Gwangju FCGwangju FC |
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| 13 Mar 21 | r04 | Gwangju FCGwangju FC | 0 - 2 | Jeonbuk Hyundai MotorsJeonbuk Hyund |
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| 17 Mar 21 | r05 | FC SeoulFC Seoul | 2 - 1 | Gwangju FCGwangju FC |
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| 20 Mar 21 | r06 | Jeju United FCJeju United F | 1 - 1 | Gwangju FCGwangju FC |
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| 04 Apr 21 | r07 | Gwangju FCGwangju FC | 2 - 1 | Incheon United FCIncheon Unite |
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| 07 Apr 21 | r08 | Gwangju FCGwangju FC | 2 - 0 | Suwon FCSuwon FC |
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| 10 Apr 21 | r09 | Seongnam FCSeongnam FC | 2 - 0 | Gwangju FCGwangju FC |
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| 17 Apr 21 | r10 | Gwangju FCGwangju FC | 0 - 1 | Pohang SteelersPohang Steele |
| |
| 20 Apr 21 | r11 | Gangwon FCGangwon FC | 0 - 1 | Gwangju FCGwangju FC |
| |
| 24 Apr 21 | r12 | Gwangju FCGwangju FC | 0 - 1 | Daegu FCDaegu FC |
| |
| 01 May 21 | r13 | Ulsan Hyundai FCUlsan Hyundai | 2 - 0 | Gwangju FCGwangju FC |
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| 11 May 21 | r15 | Suwon FCSuwon FC | 2 - 1 | Gwangju FCGwangju FC |
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| 15 May 21 | r16 | Incheon United FCIncheon Unite | 2 - 1 | Gwangju FCGwangju FC |
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| 19 May 21 | r17  | Gwangju FCGwangju FC | 0 - 0 | Jeju United FCJeju United F |
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| 23 May 21 | r18 | Gwangju FCGwangju FC | 3 - 4 | Suwon Samsung BluewingsSuwon Samsung |
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| 30 May 21 | r19 | Pohang SteelersPohang Steele | 1 - 0 | Gwangju FCGwangju FC |
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| 19 Jun 21 | r14 | Gwangju FCGwangju FC | 1 - 1 | FC SeoulFC Seoul |
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| 21 Jul 21 | r20 | Gwangju FCGwangju FC | 3 - 1 | Gangwon FCGangwon FC |
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| 01 Aug 21 | r22 | Gwangju FCGwangju FC | 0 - 0 | Seongnam FCSeongnam FC |
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| 08 Aug 21 | r23 | FC SeoulFC Seoul | 1 - 0 | Gwangju FCGwangju FC |
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| 11 Aug 21 | r21 | Jeonbuk Hyundai MotorsJeonbuk Hyund | 3 - 0 | Gwangju FCGwangju FC |
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| 15 Aug 21 | r25 | Gwangju FCGwangju FC | 1 - 0 | Incheon United FCIncheon Unite |
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| 20 Aug 21 | r26 | Daegu FCDaegu FC | 1 - 2 | Gwangju FCGwangju FC |
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| 24 Aug 21 | r27 | Gwangju FCGwangju FC | 2 - 0 | Seongnam FCSeongnam FC |
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| 11 Sep 21 | r29 | Suwon Samsung BluewingsSuwon Samsung | 2 - 2 | Gwangju FCGwangju FC |
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| 18 Sep 21 | r30 | Gwangju FCGwangju FC | 1 - 1 | Jeju United FCJeju United F |
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| 21 Sep 21 | r31 | Gwangju FCGwangju FC | 1 - 2 | Jeonbuk Hyundai MotorsJeonbuk Hyund |
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| 25 Sep 21 | r32 | Ulsan Hyundai FCUlsan Hyundai | 1 - 0 | Gwangju FCGwangju FC |
| |
| 03 Oct 21 | r33 | Gwangju FCGwangju FC | 2 - 3 | Pohang SteelersPohang Steele |
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| 17 Oct 21 | r28 | Gangwon FCGangwon FC | 2 - 1 | Gwangju FCGwangju FC |
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| 24 Oct 21 | r24 | Suwon FCSuwon FC | 1 - 3 | Gwangju FCGwangju FC |
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| 31 Oct 21 | r01 | Gwangju FCGwangju FC | 2 - 2 | Gangwon FCGangwon FC |
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| 03 Nov 21 | r02 | Gwangju FCGwangju FC | 3 - 4 | FC SeoulFC Seoul |
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| 07 Nov 21 | r03 | Pohang SteelersPohang Steele | 1 - 2 | Gwangju FCGwangju FC |
| |
| 27 Nov 21 | r04 | Seongnam FCSeongnam FC | 1 - 0 | Gwangju FCGwangju FC |
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| 04 Dec 21 | r05 | Gwangju FCGwangju FC | 1 - 1 | Incheon United FCIncheon Unite |
Team 2021 Schedules
Bucheon FC 1995
Daejeon Hana Citizen
FC Anyang
FC Seoul
Gangwon FC
Gimcheon Sangmu
Gwangju FC
Incheon United
Jeju SK
Jeonbuk Hyundai Motors
Pohang Steelers
Ulsan HD
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