Singles
2020 St. Petersburg Open
Champion	Andrey Rublev
Runner-up	Borna Ćorić
Score	7–6(7–5), 6–4
Draw	32 (4 Q / 3 WC )
Seeds	8

The tournament was played on a hard surface. Due to the ongoing COVID-19 pandemic and many ATP tournaments having been cancelled, this year's event was upgraded to ATP 500 level.

Daniil Medvedev was the defending champion, but lost in the second round to Reilly Opelka.

Andrey Rublev won the title, defeating last year finalist Borna Ćorić in the final, 7–6^(7–5), 6–4.

Seeds

Draw

Finals

	Semifinals							Final
	7	Borna Ćorić	1	6	6
	6	Milos Raonic	6	1	4
								7	Borna Ćorić	65	4
								3	Andrey Rublev	77	6
	3	Andrey Rublev	4	6	6
	2	Denis Shapovalov	6	3	4

Top half

	First round							Second round							Quarterfinals							Semifinals
	1	D Medvedev	3	6	6
		R Gasquet	6	3	0			1	D Medvedev	6	5	4
	Q	N Serdarušić	6	65	2				R Opelka	2	7	6
		R Opelka	3	77	6											R Opelka	63	3
	WC	R Safiullin	6	6											7	B Ćorić	77	6
	LL	E Gómez	4	2				WC	R Safiullin	3	5
		F López	3	62				7	B Ćorić	6	7
	7	B Ćorić	6	77																		7	B Ćorić	1	6	6
	4	K Khachanov	6	6																		6	M Raonic	6	1	4
		J Duckworth	4	4				4	K Khachanov	4	7	6
		T Sandgren	5	6	5			WC	A Karatsev	6	5	3
	WC	A Karatsev	7	3	7										4	K Khachanov	1	61
		A Bublik	2	77	6										6	M Raonic	6	77
	PR	M McDonald	6	62	4				A Bublik	3	2
	Q	J. J. Wolf	65	1				6	M Raonic	6	6
	6	M Raonic	77	6

Bottom half

	First round							Second round							Quarterfinals							Semifinals
	8	T Fritz	4	6	3
		C Norrie	6	4	6				C Norrie	7	65	6
		M Kukushkin	3	67					M Kecmanović	5	77	3
		M Kecmanović	6	79												C Norrie	2	1
	Q	P Kotov	6	2	3										3	A Rublev	6	6
		U Humbert	4	6	6				U Humbert	6	4	5
		V Pospisil	2	4				3	A Rublev	4	6	7
	3	A Rublev	6	6																		3	A Rublev	4	6	6
	5	S Wawrinka	3	77	7																	2	D Shapovalov	6	3	4
		D Evans	6	63	5			5	S Wawrinka	6	3	6
	WC	E Donskoy	6	77				WC	E Donskoy	1	6	3
		E Gerasimov	4	64											5	S Wawrinka	4	5
		A Mannarino	3	66											2	D Shapovalov	6	7
	Q	I Ivashka	6	78				Q	I Ivashka	1	4
	LL	V Troicki	2	3				2	D Shapovalov	6	6
	2	D Shapovalov	6	6

Qualifying

Qualifying draw

First qualifier

	First round							Qualifying competition
	1	J. J. Wolf	4	6	6
		Alexey Vatutin	6	1	3
								1	J. J. Wolf	3	7	6
								WC	Alen Avidzba	6	5	1
	WC	Alen Avidzba	4	6	77
	5	Ernests Gulbis	6	3	62

Second qualifier

	First round							Qualifying competition
	2	Ilya Ivashka	7	6
		Max Purcell	5	4
								2	Ilya Ivashka	7	6
								7	Viktor Troicki	5	1
	PR	Andrey Kuznetsov	3	77	4
	7	Viktor Troicki	6	65	6

Third qualifier

	First round							Qualifying competition
	3	Nikola Milojević	6	6
		Evgeny Karlovskiy	4	0
								3	Nikola Milojević	77	2	2
								WC	Nino Serdarušić	61	6	6
	WC	Nino Serdarušić	77	3	6
	8	Cem İlkel	65	6	4

Fourth qualifier

	First round							Qualifying competition
	4	Emilio Gómez	79	1	6
		Teymuraz Gabashvili	67	6	4
								4	Emilio Gómez	7	64	2
								WC	Pavel Kotov	5	77	6
	WC	Pavel Kotov	6	3	7
	6	Jurij Rodionov	4	6	5

References

• Main Draw
• Qualifying Draw