Singles
2021 Korea Open
Final
Champion	Zhu Lin
Runner-up	Kristina Mladenovic
Score	6–0, 6–4
Details
Draw	28
Seeds	8
Events
Singles Doubles
← 2019 · Korea Open · 2022 →

Karolína Muchová was the reigning champion, but chose not to participate.

Zhu Lin won her first WTA 125 tournament, defeating Kristina Mladenovic in the final, 6–0, 6–4.^[1]

	Semifinals							Final
	1	Kristina Mladenovic	3	7	77
		Ekaterina Kazionova	6	5	64
								1	Kristina Mladenovic	0	4
								2	Zhu Lin	6	6
		Anastasia Kulikova	1	66
	2	Zhu Lin	6	78

	First round							Second round							Quarterfinals							Semifinals
								1	K Mladenovic	6	5	6
		J-y Seo	1	1					N-l Han	4	7	0
		N-l Han	6	6											1	K Mladenovic	5	6	6
	Alt	J Moon	0	1											8	Y Naito	7	2	4
	WC	B Fruhvirtová	6	6				WC	B Fruhvirtová	4	2
	WC	E-y Park	1	4				8	Y Naito	6	6
	8	Y Naito	6	6																		1	K Mladenovic	3	7	77
																							E Kazionova	6	5	64
								3	RL Jani	5	2
		D-b Kim	2	3					E Kazionova	7	6
		E Kazionova	6	6												E Kazionova	6	5	77
		F Contreras	3	1												L Fruhvirtová	3	7	64
		L Fruhvirtová	6	6					L Fruhvirtová	7	6
	WC	D-y Back	6	3	3			6	S-j Jang	5	3
	6	S-j Jang	3	6	6

	First round							Second round							Quarterfinals							Semifinals
	5	A Hartono	6	6
		C Zhao	2	3				5	A Hartono	6	6
		O-y Choi	3	6	64				J-h Choi	1	1
		J-h Choi	6	4	77										5	A Hartono	2	4
		A Kulikova	6	6												A Kulikova	6	6
		R Bhatia	0	2					A Kulikova	6	6
								4	V Grammatikopoulou	1	2
																							A Kulikova	1	66
	7	I Shinikova	6	6																		2	L Zhu	6	78
		Y-w Jeong	4	1				7	I Shinikova	6	6
		O Tjandramulia	3	2				WC	B-y Jeong	1	0
	WC	B-y Jeong	6	6											7	I Shinikova	3	0
		P Plipuech	1	6	6										2	L Zhu	6	6
		E-h Lee	6	3	4				P Plipuech	1	1
								2	L Zhu	6	6

• Main draw