2021 St. Petersburg Ladies' Trophy – Singles

Petersburg Ladies' Trophy">St. Petersburg Ladies' Trophy, after Margarita Gasparyan retired from the final with the scoreline at 6–3, 2–1.

Singles
2021 St. Petersburg Ladies' Trophy
Final
Champion	Daria Kasatkina
Runner-up	Margarita Gasparyan
Score	6–3, 2–1, ret.
Details
Draw	28 (6 Q / 4 WC )
Seeds	8
Events
Singles Doubles
← 2020 · St. Petersburg Ladies' Trophy · 2022 →

Kiki Bertens was the two-time defending champion, but she chose not to participate.

This was the first tournament since Oakland in 1993 in which seven of the eight quarterfinalists were all from the same country. It was also the first tournament in WTA history in which all four semifinalists represented Russia.

Key

Finals

	Semifinals							Final
	WC	Margarita Gasparyan	6	711
	WC	Vera Zvonareva	3	69
								WC	Margarita Gasparyan	3	1r
								8	Daria Kasatkina	6	2
	4	Svetlana Kuznetsova	6	0	2
	8	Daria Kasatkina	1	6	6

Top half

	First round							Second round							Quarterfinals							Semifinals
								1	E Alexandrova	6	6
		S Vögele	0	6	4				T Martincová	3	4
		T Martincová	6	4	6										1	E Alexandrova	2	5
		K Siniaková	6	6											WC	M Gasparyan	6	7
		K Flipkens	1	2					K Siniaková	4	4
	WC	M Gasparyan	61	6	6			WC	M Gasparyan	6	6
	7	K Mladenovic	77	1	1																	WC	M Gasparyan	6	711
																						WC	V Zvonareva	3	69
								3	F Ferro	78	5	62
	Q	Ar Rodionova	1	3				WC	V Zvonareva	66	7	77
	WC	V Zvonareva	6	6											WC	V Zvonareva	6	6
		K Zavatska	2	78	5										Q	A Gasanova	3	1
	Q	A Gasanova	6	66	7			Q	A Gasanova	1	710	77
	LL	Ç Büyükakçay	4	4				5	A Pavlyuchenkova	6	68	64
	5	A Pavlyuchenkova	6	6

Bottom half

	First round							Second round							Quarterfinals							Semifinals
	6	J Ostapenko	6	6
		P Badosa	2	2				6	J Ostapenko	3	69
	Q	J Cristian	63	6	2			Q	J Cristian	6	711
	PR	V Lapko	77	4	1r										Q	J Cristian	77	3	3
	Q	Xin Wang	6	5	7										4	S Kuznetsova	65	6	6
		V Tomova	1	7	5			Q	Xin Wang	1	5
								4	S Kuznetsova	6	7
																						4	S Kuznetsova	6	0	2
	8	D Kasatkina	6	77																		8	D Kasatkina	1	6	6
	Q	C Tauson	4	60				8	D Kasatkina	5	6	77
		A Bogdan	6	2	1				A Sasnovich	7	3	62
		A Sasnovich	2	6	6										8	D Kasatkina	1	6	6
	WC	D Mishina	1	77	1										2	V Kudermetova	6	1	2
	Q	K Rakhimova	6	62	6			Q	K Rakhimova	5	6	65
								2	V Kudermetova	7	3	77

Seeds

Qualifiers

Lucky loser

Qualifying draw

First qualifier

	First round							Qualifying competition
	1	Clara Tauson	7	6
	WC	Ekaterina Shalimova	5	3
								1	Clara Tauson	7	6
								11	Lesley Pattinama Kerkhove	5	2
		Ekaterine Gorgodze	6	60	3
	11	Lesley Pattinama Kerkhove	0	77	6

Second qualifier

	First round							Qualifying competition
	Alt	Sofya Lansere	3	0
	WC	Alina Charaeva	6	6
								WC	Alina Charaeva	6	1	2
								7	Jaqueline Cristian	4	6	6
		Natalija Kostić	1	3
	7	Jaqueline Cristian	6	6

Third qualifier

	First round							Qualifying competition
	3	Monica Niculescu	3	4
	WC	Ana Konjuh	6	6
								WC	Ana Konjuh	4	3
									Anastasia Gasanova	6	6
		Anastasia Gasanova	6	6
	12	Laura Ioana Paar	4	3

Fourth qualifier

	First round							Qualifying competition
	4	Natalia Vikhlyantseva	6	4	1
		Valeria Savinykh	2	6	6
									Valeria Savinykh	3	4
								9	Arina Rodionova	6	6
		Kathinka von Deichmann	4	4
	9	Arina Rodionova	6	6

Fifth qualifier

	First round							Qualifying competition
	5	Kamilla Rakhimova	6	4	6
		Aleksandra Krunić	2	6	4
								5	Kamilla Rakhimova	6	2	6
								8	Magdalena Fręch	3	6	2
	WC	Polina Kudermetova	1	3
	8	Magdalena Fręch	6	6

Sixth qualifier

	First round							Qualifying competition
	6	Wang Xinyu	6	6
		Marina Melnikova	2	3
								6	Wang Xinyu	6	6
								10	Çağla Büyükakçay	2	3
		Jana Fett	3	6	5
	10	Çağla Büyükakçay	6	4	7