Suwon Samsung Bluewings were relegated from the K League 1 for the first time in the club's history.
When the first and second round matches were finished as draws, their winners were decided on the regular season rankings without extra time and penalty shoot-outs.
[4] Daegu FC won 6–5 on aggregate and therefore both clubs remain in their respective leagues.
Jeonbuk Hyundai Motors won 4–2 on aggregate and therefore both clubs remain in their respective leagues.
Source: K LeagueNotes:† Team played previous season in K League 1.