1. Round | 01/03/2018 | Jeju United | - | FC Seoul | 0:0 | ||||
2. Round | 11/03/2018 | FC Seoul | - | Gangwon FC | 1:2 | ||||
4. Round | 01/04/2018 | FC Seoul | - | Incheon United | 1:1 | ||||
5. Round | 08/04/2018 | Suwon Bluewings | - | FC Seoul | 0:0 | ||||
6. Round | 11/04/2018 | FC Seoul | - | Pohang Steelers | 2:1 | ||||
9. Round | 25/04/2018 | Jeonnam Dragons | - | FC Seoul | 2:1 | ||||
10. Round | 28/04/2018 | FC Seoul | - | Sangju Sangmu | 0:0 | ||||
11. Round | 02/05/2018 | Gyeongnam FC | - | FC Seoul | 0:0 | ||||
12. Round | 05/05/2018 | FC Seoul | - | Suwon Bluewings | 2:1 | ||||
13. Round | 12/05/2018 | Gangwon FC | - | FC Seoul | 1:1 | ||||
14. Round | 20/05/2018 | FC Seoul | - | Jeonbuk FC | 0:4 | ||||
15. Round | 08/07/2018 | Daegu FC | - | FC Seoul | 2:2 | ||||
17. Round | 15/07/2018 | FC Seoul | - | Ulsan Hyundai FC | 1:1 | ||||
18. Round | 18/07/2018 | FC Seoul | - | Jeonnam Dragons | 2:1 | ||||
19. Round | 22/07/2018 | Incheon United | - | FC Seoul | 2:1 |