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.

Seeds

Draw

Finals

	Semifinals							Final
	6	Hsieh Su-wei	4	7	4
		Ajla Tomljanović	6	5	6
									Ajla Tomljanović	62	6	2
								2	Kiki Bertens	77	4	6
	3	Maria Sakkari	4	2
	2	Kiki Bertens	6	6

Top half

	First round							Second round							Quarterfinals							Semifinals
	1	J Ostapenko	6	6
		L Arruabarrena	3	3				1	J Ostapenko	3	2
		J Larsson	1	2					E Alexandrova	6	6
		E Alexandrova	6	6												E Alexandrova	0	1
	WC	J-h Choi	3	6	4										6	S-w Hsieh	6	6
		S Vögele	6	2	6				S Vögele	2	1
	Q	J Teichmann	6	1	60			6	S-w Hsieh	6	6
	6	S-w Hsieh	2	6	77																	6	S-w Hsieh	4	7	4
	4	M Rybáriková	3	2r																			A Tomljanović	6	5	6
	PR	M Minella	6	3				PR	M Minella	6	6
	Q	P Hon	3	6	6			Q	P Hon	4	3
	WC	S-j Jang	6	2	2										PR	M Minella	2	6	5
		P Hercog	1	3												A Tomljanović	6	4	7
		T Zidanšek	6	6					T Zidanšek	6	1	3
		A Tomljanović	3	7	7				A Tomljanović	2	6	6
	5	A Van Uytvanck	6	5	5

Bottom half

	First round							Second round							Quarterfinals							Semifinals
	7	I-C Begu	7	6
	Q	M Barthel	5	4				7	I-C Begu	6	6
	PR	B Mattek-Sands	4	5					A Radwańska	4	3
		A Radwańska	6	7											7	I-C Begu	3	6	4
	Q	V Flink	5	4											3	M Sakkari	6	4	6
	PR	M Gasparyan	7	6				PR	M Gasparyan	2	2
		AK Schmiedlová	0	1				3	M Sakkari	6	6
	3	M Sakkari	6	6																		3	M Sakkari	4	2
	8	K Flipkens	6	6																		2	K Bertens	6	6
	WC	S-h Park	0	2				8	K Flipkens	4	6	5
		E Rodina	6	6					E Rodina	6	4	7
	Q	D Radanović	1	1												E Rodina	6	3	0
		D Jakupović	3	6	6										2	K Bertens	3	6	6
	Q	N-l Han	6	4	3				D Jakupović	4	5
		L Kumkhum	67	2				2	K Bertens	6	7
	2	K Bertens	79	6

Qualifying

Qualifying draw

First qualifier

	First round							Qualifying competition
	1	Mona Barthel	6	6
	WC	Hanna Chang	1	3
								1	Mona Barthel	6	6
								7	Sílvia Soler Espinosa	3	4
		Peangtarn Plipuech	3	0
	7	Sílvia Soler Espinosa	6	6

Second qualifier

	First round							Qualifying competition
	2	Arantxa Rus	6	78
	WC	Kim Da-bin	2	66
								2	Arantxa Rus	1	6	66
								11	Varvara Flink	6	3	78
	WC	Jeong Su-nam	2	6	0
	11	Varvara Flink	6	3	6

Third qualifier

	First round							Qualifying competition
	3	Jil Teichmann	6	6
		Amandine Hesse	4	0
								3	Jil Teichmann	6	4	7
								8	Bibiane Schoofs	4	6	5
		Ellen Perez	0	4
	8	Bibiane Schoofs	6	6

Fourth qualifier

	First round							Qualifying competition
	4	Arina Rodionova	77	0	2
		Mai Minokoshi	63	6	6
									Mai Minokoshi	1	4
								10	Dejana Radanović	6	6
	WC	Lee So-ra	6	2	1
	10	Dejana Radanović	2	6	6

Fifth qualifier

	First round							Qualifying competition
	5	Harriet Dart	6	1	5
		Han Na-lae	0	6	7
									Han Na-lae	7	6
								PR	Barbora Štefková	5	3
	PR	Barbora Štefková	6	6
	12	Nina Stojanović	1	1

Sixth qualifier

	First round							Qualifying competition
	6	Priscilla Hon	6	6
		Zhang Yuxuan	4	4
								6	Priscilla Hon	77	6
									Katy Dunne	65	2
		Katy Dunne	2	6	6
	9	Jaimee Fourlis	6	2	2

External links

• Main draw
• Qualifying draw