2018 Korea Open – Singles
| Singles | |
|---|---|
| 2018 Korea Open | |
| Champion | Kiki Bertens |
| Runner-up | Ajla Tomljanović |
| Score | 7–6(7–2), 4–6, 6–2 |
| Draw | 32 |
| Seeds | 8 |
Jeļena Ostapenko was the defending champion, but lost in the second round to Ekaterina Alexandrova.
Kiki Bertens won the title, defeating Ajla Tomljanović in the final, 7–6(7–2), 4–6, 6–2.
This tournament was the last in Agnieszka Radwańska's career. The former world No. 2 played the final match of her professional career in the second round, when she lost to Irina-Camelia Begu in straight sets.