| 08 May 20 | r01        | Jeonbuk Hyundai MotorsJeonbuk Hyund | 1 - 0 | Suwon Samsung BluewingsSuwon Samsung |
| 09 May 20 | r01        | Ulsan Hyundai FCUlsan Hyundai | 4 - 0 | Sangju SangmuSangju Sangmu |
| 09 May 20 | r01        | Incheon United FCIncheon Unite | 0 - 0 | Daegu FCDaegu FC |
| 09 May 20 | r01        | Gwangju FCGwangju FC | 0 - 2 | Seongnam FCSeongnam FC |
| 10 May 20 | r01        | Pohang SteelersPohang Steele | 2 - 0 | Busan IParkBusan IPark |
| 10 May 20 | r01        | Gangwon FCGangwon FC | 3 - 1 | FC SeoulFC Seoul |
| |
| 16 May 20 | r02        | Sangju SangmuSangju Sangmu | 2 - 0 | Gangwon FCGangwon FC |
| 16 May 20 | r02        | Daegu FCDaegu FC | 1 - 1 | Pohang SteelersPohang Steele |
| 16 May 20 | r02        | Busan IParkBusan IPark | 1 - 2 | Jeonbuk Hyundai MotorsJeonbuk Hyund |
| 17 May 20 | r02        | Suwon Samsung BluewingsSuwon Samsung | 2 - 3 | Ulsan Hyundai FCUlsan Hyundai |
| 17 May 20 | r02        | Seongnam FCSeongnam FC | 0 - 0 | Incheon United FCIncheon Unite |
| 17 May 20 | r02        | FC SeoulFC Seoul | 1 - 0 | Gwangju FCGwangju FC |
| |
| 22 May 20 | r03        | Pohang SteelersPohang Steele | 1 - 2 | FC SeoulFC Seoul |
| 23 May 20 | r03        | Gangwon FCGangwon FC | 1 - 1 | Seongnam FCSeongnam FC |
| 23 May 20 | r03        | Suwon Samsung BluewingsSuwon Samsung | 1 - 0 | Incheon United FCIncheon Unite |
| 23 May 20 | r03        | Sangju SangmuSangju Sangmu | 1 - 0 | Gwangju FCGwangju FC |
| 24 May 20 | r03        | Jeonbuk Hyundai MotorsJeonbuk Hyund | 2 - 0 | Daegu FCDaegu FC |
| 24 May 20 | r03        | Ulsan Hyundai FCUlsan Hyundai | 1 - 1 | Busan IParkBusan IPark |
| |
| 29 May 20 | r04        | Daegu FCDaegu FC | 1 - 1 | Sangju SangmuSangju Sangmu |
| 30 May 20 | r04        | Gangwon FCGangwon FC | 1 - 0 | Jeonbuk Hyundai MotorsJeonbuk Hyund |
| 30 May 20 | r04        | Gwangju FCGwangju FC | 1 - 1 | Ulsan Hyundai FCUlsan Hyundai |
| 30 May 20 | r04        | Busan IParkBusan IPark | 0 - 0 | Suwon Samsung BluewingsSuwon Samsung |
| 31 May 20 | r04        | FC SeoulFC Seoul | 0 - 1 | Seongnam FCSeongnam FC |
| 31 May 20 | r04        | Incheon United FCIncheon Unite | 1 - 4 | Pohang SteelersPohang Steele |
| |
| 05 Jun 20 | r05        | Incheon United FCIncheon Unite | 1 - 2 | Gangwon FCGangwon FC |
| 06 Jun 20 | r05        | FC SeoulFC Seoul | 1 - 4 | Jeonbuk Hyundai MotorsJeonbuk Hyund |
| 06 Jun 20 | r05        | Pohang SteelersPohang Steele | 0 - 4 | Ulsan Hyundai FCUlsan Hyundai |
| 06 Jun 20 | r05        | Busan IParkBusan IPark | 1 - 1 | Sangju SangmuSangju Sangmu |
| 07 Jun 20 | r05        | Suwon Samsung BluewingsSuwon Samsung | 0 - 1 | Gwangju FCGwangju FC |
| 07 Jun 20 | r05        | Seongnam FCSeongnam FC | 1 - 2 | Daegu FCDaegu FC |
| |
| 13 Jun 20 | r06        | Ulsan Hyundai FCUlsan Hyundai | 1 - 0 | Seongnam FCSeongnam FC |
| 13 Jun 20 | r06        | Jeonbuk Hyundai MotorsJeonbuk Hyund | 1 - 0 | Incheon United FCIncheon Unite |
| 13 Jun 20 | r06        | Sangju SangmuSangju Sangmu | 2 - 4 | Pohang SteelersPohang Steele |
| 13 Jun 20 | r06        | Suwon Samsung BluewingsSuwon Samsung | 2 - 2 | Gangwon FCGangwon FC |
| 14 Jun 20 | r06        | Daegu FCDaegu FC | 6 - 0 | FC SeoulFC Seoul |
| 14 Jun 20 | r06        | Gwangju FCGwangju FC | 3 - 1 | Busan IParkBusan IPark |
| |
| 16 Jun 20 | r07        | Gangwon FCGangwon FC | 0 - 3 | Ulsan Hyundai FCUlsan Hyundai |
| 16 Jun 20 | r07        | Pohang SteelersPohang Steele | 1 - 2 | Jeonbuk Hyundai MotorsJeonbuk Hyund |
| 16 Jun 20 | r07        | Seongnam FCSeongnam FC | 0 - 2 | Suwon Samsung BluewingsSuwon Samsung |
| 17 Jun 20 | r07        | Gwangju FCGwangju FC | 2 - 1 | Incheon United FCIncheon Unite |
| 17 Jun 20 | r07        | Sangju SangmuSangju Sangmu | 1 - 0 | FC SeoulFC Seoul |
| 17 Jun 20 | r07        | Busan IParkBusan IPark | 2 - 2 | Daegu FCDaegu FC |
| |
| 20 Jun 20 | r08        | FC SeoulFC Seoul | 0 - 2 | Ulsan Hyundai FCUlsan Hyundai |
| 20 Jun 20 | r08        | Pohang SteelersPohang Steele | 2 - 0 | Gangwon FCGangwon FC |
| 20 Jun 20 | r08        | Seongnam FCSeongnam FC | 0 - 1 | Sangju SangmuSangju Sangmu |
| 21 Jun 20 | r08        | Jeonbuk Hyundai MotorsJeonbuk Hyund | 1 - 0 | Gwangju FCGwangju FC |
| 21 Jun 20 | r08        | Incheon United FCIncheon Unite | 0 - 1 | Busan IParkBusan IPark |
| 21 Jun 20 | r08        | Daegu FCDaegu FC | 3 - 1 | Suwon Samsung BluewingsSuwon Samsung |
| |
| 26 Jun 20 | r09        | Gwangju FCGwangju FC | 0 - 2 | Pohang SteelersPohang Steele |
| 27 Jun 20 | r09        | FC SeoulFC Seoul | 1 - 0 | Incheon United FCIncheon Unite |
| 27 Jun 20 | r09        | Busan IParkBusan IPark | 1 - 1 | Seongnam FCSeongnam FC |
| 27 Jun 20 | r09        | Daegu FCDaegu FC | 2 - 1 | Gangwon FCGangwon FC |
| 28 Jun 20 | r09        | Ulsan Hyundai FCUlsan Hyundai | 0 - 2 | Jeonbuk Hyundai MotorsJeonbuk Hyund |
| 28 Jun 20 | r09        | Suwon Samsung BluewingsSuwon Samsung | 0 - 1 | Sangju SangmuSangju Sangmu |
| |
| 04 Jul 20 | r10        | Ulsan Hyundai FCUlsan Hyundai | 4 - 1 | Incheon United FCIncheon Unite |
| 04 Jul 20 | r10        | Gangwon FCGangwon FC | 2 - 4 | Busan IParkBusan IPark |
| 04 Jul 20 | r10        | Suwon Samsung BluewingsSuwon Samsung | 3 - 3 | FC SeoulFC Seoul |
| 05 Jul 20 | r10        | Sangju SangmuSangju Sangmu | 1 - 0 | Jeonbuk Hyundai MotorsJeonbuk Hyund |
| 05 Jul 20 | r10        | Seongnam FCSeongnam FC | 0 - 4 | Pohang SteelersPohang Steele |
| 05 Jul 20 | r10        | Gwangju FCGwangju FC | 2 - 4 | Daegu FCDaegu FC |
| |
| 10 Jul 20 | r11        | Busan IParkBusan IPark | 2 - 0 | FC SeoulFC Seoul |
| 11 Jul 20 | r11        | Jeonbuk Hyundai MotorsJeonbuk Hyund | 2 - 2 | Seongnam FCSeongnam FC |
| 11 Jul 20 | r11        | Pohang SteelersPohang Steele | 1 - 1 | Suwon Samsung BluewingsSuwon Samsung |
| 11 Jul 20 | r11        | Incheon United FCIncheon Unite | 1 - 1 | Sangju SangmuSangju Sangmu |
| 12 Jul 20 | r11        | Daegu FCDaegu FC | 1 - 3 | Ulsan Hyundai FCUlsan Hyundai |
| 12 Jul 20 | r11        | Gangwon FCGangwon FC | 4 - 1 | Gwangju FCGwangju FC |
| |
| 18 Jul 20 | r12        | Busan IParkBusan IPark | 0 - 0 | Gwangju FCGwangju FC |
| 18 Jul 20 | r12        | Sangju SangmuSangju Sangmu | 2 - 0 | Daegu FCDaegu FC |
| 18 Jul 20 | r12        | FC SeoulFC Seoul | 1 - 3 | Pohang SteelersPohang Steele |
| 19 Jul 20 | r12        | Ulsan Hyundai FCUlsan Hyundai | 1 - 0 | Gangwon FCGangwon FC |
| 19 Jul 20 | r12        | Suwon Samsung BluewingsSuwon Samsung | 0 - 1 | Seongnam FCSeongnam FC |
| 19 Jul 20 | r12        | Incheon United FCIncheon Unite | 1 - 1 | Jeonbuk Hyundai MotorsJeonbuk Hyund |
| |
| 25 Jul 20 | r13        | Sangju SangmuSangju Sangmu | 1 - 5 | Ulsan Hyundai FCUlsan Hyundai |
| 25 Jul 20 | r13        | Seongnam FCSeongnam FC | 0 - 0 | Gangwon FCGangwon FC |
| 25 Jul 20 | r13        | Gwangju FCGwangju FC | 0 - 1 | Suwon Samsung BluewingsSuwon Samsung |
| 26 Jul 20 | r13        | Jeonbuk Hyundai MotorsJeonbuk Hyund | 3 - 0 | FC SeoulFC Seoul |
| 26 Jul 20 | r13        | Pohang SteelersPohang Steele | 1 - 1 | Incheon United FCIncheon Unite |
| 26 Jul 20 | r13        | Daegu FCDaegu FC | 3 - 0 | Busan IParkBusan IPark |
| |
| 01 Aug 20 | r14        | Jeonbuk Hyundai MotorsJeonbuk Hyund | 2 - 1 | Pohang SteelersPohang Steele |
| 01 Aug 20 | r14        | Seongnam FCSeongnam FC | 1 - 2 | FC SeoulFC Seoul |
| 01 Aug 20 | r14        | Incheon United FCIncheon Unite | 1 - 3 | Gwangju FCGwangju FC |
| 02 Aug 20 | r14        | Gangwon FCGangwon FC | 2 - 2 | Sangju SangmuSangju Sangmu |
| 02 Aug 20 | r14        | Suwon Samsung BluewingsSuwon Samsung | 0 - 1 | Daegu FCDaegu FC |
| 02 Aug 20 | r14        | Busan IParkBusan IPark | 1 - 2 | Ulsan Hyundai FCUlsan Hyundai |
| |
| 07 Aug 20 | r15        | FC SeoulFC Seoul | 2 - 0 | Gangwon FCGangwon FC |
| 08 Aug 20 | r15        | Ulsan Hyundai FCUlsan Hyundai | 0 - 0 | Suwon Samsung BluewingsSuwon Samsung |
| 08 Aug 20 | r15        | Pohang SteelersPohang Steele | 1 - 1 | Gwangju FCGwangju FC |
| 08 Aug 20 | r15        | Daegu FCDaegu FC | 0 - 2 | Jeonbuk Hyundai MotorsJeonbuk Hyund |
| 09 Aug 20 | r15        | Sangju SangmuSangju Sangmu | 2 - 0 | Busan IParkBusan IPark |
| 09 Aug 20 | r15        | Incheon United FCIncheon Unite | 0 - 2 | Seongnam FCSeongnam FC |
| |
| 14 Aug 20 | r16        | Seongnam FCSeongnam FC | 1 - 1 | Busan IParkBusan IPark |
| 15 Aug 20 | r16        | Ulsan Hyundai FCUlsan Hyundai | 2 - 0 | Pohang SteelersPohang Steele |
| 15 Aug 20 | r16        | FC SeoulFC Seoul | 2 - 1 | Sangju SangmuSangju Sangmu |
| 15 Aug 20 | r16        | Suwon Samsung BluewingsSuwon Samsung | 1 - 3 | Jeonbuk Hyundai MotorsJeonbuk Hyund |
| 16 Aug 20 | r16        | Daegu FCDaegu FC | 0 - 1 | Incheon United FCIncheon Unite |
| 16 Aug 20 | r16        | Gwangju FCGwangju FC | 2 - 2 | Gangwon FCGangwon FC |
| |
| 22 Aug 20 | r17        | Incheon United FCIncheon Unite | 1 - 0 | Suwon Samsung BluewingsSuwon Samsung |
| 22 Aug 20 | r17        | Gwangju FCGwangju FC | 0 - 0 | FC SeoulFC Seoul |
| 22 Aug 20 | r17        | Busan IParkBusan IPark | 2 - 1 | Pohang SteelersPohang Steele |
| 22 Aug 20 | r17        | Gangwon FCGangwon FC | 0 - 0 | Daegu FCDaegu FC |