Singles
2021 J&T Banka Ostrava Open
Champion	Anett Kontaveit
Runner-up	Maria Sakkari
Score	6–2, 7–5
Draw	28
Seeds	8

Aryna Sabalenka was the defending champion, but she chose not to compete this year.

Anett Kontaveit won her maiden WTA 500 title without dropping a set, defeating Maria Sakkari in the final, 6–2, 7–5.

Seeds

The top four seeds received a bye into the second round.

Draw

Finals

	Semifinals							Final
	1	Iga Świątek	4	5
	4	Maria Sakkari	6	7
								4	Maria Sakkari	2	5
									Anett Kontaveit	6	7
		Anett Kontaveit	6	6
	2	Petra Kvitová	0	4

Top half

	First round							Second round							Quarterfinals							Semifinals
								1	I Świątek	6	6
		S Zhang	7	67	4				Y Putintseva	4	4
		Y Putintseva	5	79	6										1	I Świątek	77	6
	Q	O Dodin	2	63											7	E Rybakina	65	2
	Q	M Linette	6	77				Q	M Linette	3	6	1
		V Kudermetova	1	3				7	E Rybakina	6	2	6
	7	E Rybakina	6	6																		1	I Świątek	4	5
																						4	M Sakkari	6	7
								4	M Sakkari	6	6
	LL	A Blinkova	4	0				WC	J Ostapenko	4	2
	WC	J Ostapenko	6	6											4	M Sakkari	7	6
	WC	T Martincová	5	6	79										WC	T Martincová	5	3
	WC	K Siniaková	7	4	67			WC	T Martincová	77	78
	Q	A Konjuh	63	1				5	A Pavlyuchenkova	65	66
	5	A Pavlyuchenkova	77	6

Bottom half

	First round							Second round							Quarterfinals							Semifinals
	9	P Badosa	6	6
	LL	V Gracheva	2	2				9	P Badosa	3	4
		S Cîrstea	4	4					A Kontaveit	6	6
		A Kontaveit	6	6												A Kontaveit	6	6
	Q	A Zakharova	3	3											3	B Bencic	4	3
		S Sorribes Tormo	6	6					S Sorribes Tormo	2	3
								3	B Bencic	6	6
																							A Kontaveit	6	6
	6	A Kerber	2	3																		2	P Kvitová	0	4
		J Teichmann	6	6					J Teichmann	6	1	6
		A Riske	6	1	6				A Riske	3	6	4
	Q	F Ferro	4	6	4											J Teichmann	4	4
	WC	C Garcia	2	66											2	P Kvitová	6	6
	Q	A Potapova	6	78				Q	A Potapova	1	77	3
								2	P Kvitová	6	64	6

Qualifying

Qualifying draw

First qualifier

	First round							Qualifying competition
	1	Ekaterina Alexandrova	6	6
	WC	Julia Lohoff	0	4
								1	Ekaterina Alexandrova	5	1r
								7	Anastasia Potapova	7	3
		Stefanie Vögele	6	2	2
	7	Anastasia Potapova	3	6	6

Second qualifier

	First round							Qualifying competition
	2	Magda Linette	6	6
		Rutuja Bhosale	0	1
								2	Magda Linette	6	6
									Katarzyna Kawa	1	2
		Katarzyna Kawa	6	6
	11	Misaki Doi	2	4

Third qualifier

	First round							Qualifying competition
	3	Varvara Gracheva	77	6
		Anna Danilina	63	4
								3	Varvara Gracheva	77	1	4
								9	Océane Dodin	64	6	6
		Anna-Lena Friedsam	63	65
	9	Océane Dodin	77	77

Fourth qualifier

	First round							Qualifying competition
	4	Rebecca Peterson	67	6	2
		Anastasia Zakharova	79	2	6
									Anastasia Zakharova	6	6
								12	Astra Sharma	4	3
	WC	Antonia Ružić	4	1
	12	Astra Sharma	6	6

Fifth qualifier

	First round							Qualifying competition
	5	Ana Konjuh	6	6
	WC	Radka Zelníčková	4	1
								5	Ana Konjuh	77	6
								8	Bernarda Pera	64	3
		Katarzyna Piter	0	1
	8	Bernarda Pera	6	6

Sixth qualifier

	First round							Qualifying competition
	6	Fiona Ferro	3	77	6
	WC	Oksana Kalashnikova	6	63	1
								6	Fiona Ferro	6	6
								10	Anna Blinkova	1	1
	WC	Rosalie van der Hoek	0	2
	10	Anna Blinkova	6	6

External links

• Main draw
• Qualifying draw