2021 St. Petersburg Open – Singles

Singles
2021 St. Petersburg Open
2020 Champion	Andrey Rublev
Draw	28 (4 Q / 3 WC )
Seeds	8

Main article: 2021 St. Petersburg Open

Andrey Rublev is the defending champion.

Seeds

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

1. Andrey Rublev
2. Denis Shapovalov
3. Roberto Bautista Agut
4. Aslan Karatsev
5. Taylor Fritz
6. Karen Khachanov
7. Alexander Bublik
8. Sebastian Korda

Draw

Key

• Q = Qualifier
• WC = Wild card
• LL = Lucky loser
• Alt = Alternate
• SE = Special exempt
• PR = Protected ranking
• ITF = ITF entry
• JE = Junior exempt
• w/o = Walkover
• r = Retired
• d = Defaulted
• SR = Special ranking

Finals

Semifinals

Final

Top half

	First Round							Second Round							Quarterfinals							Semifinals
								1	A Rublev	6	6
		L Đere	3	2					I Ivashka	4	4
		I Ivashka	6	6											1	A Rublev
	Q	B van de Zandschulp	6	6
	Q	Y Nishioka	2	2				Q	B van de Zandschulp
	WC	N Serdarušić	62	5				8	S Korda
	8	S Korda	77	7
								3	R Bautista Agut
	Q	E Gerasimov	5	4					M McDonald
		M McDonald	7	6
		M Čilić	6	6
		A Ramos Viñolas	2	3					M Čilić
		A Mannarino	3	3				6	K Khachanov
	6	K Khachanov	6	6

Bottom half

	First Round							Second Round							Quarterfinals							Semifinals
	5	T Fritz	6	6
	Q	E Ruusuvuori	1	4				5	T Fritz
		P Martínez	3	2					T Paul
		T Paul	6	6
		J Millman	6	6
	WC	Y Oliel	1	1					J Millman
								4	A Karatsev
	7	A Bublik	6	6
	WC	E Tiurnev	3	4				7	A Bublik
		J-L Struff	77	6					J-L Struff
		J Duckworth	63	3
		F Delbonis	2	61											2	D Shapovalov
	PR	P Andújar	6	77				PR	P Andújar	6	3	0
								2	D Shapovalov	2	6	6

Qualifying

Seeds

1. Botic van de Zandschulp (Qualified)
2. Benjamin Bonzi (First round)
3. Federico Coria (First round)
4. Miomir Kecmanović (Qualifying competition)
5. Emil Ruusuvuori (Qualified)
6. Yoshihito Nishioka (Qualified)
7. Mikael Ymer (First round)
8. Egor Gerasimov (Qualified)

Qualifiers

1. Botic van de Zandschulp
2. Emil Ruusuvuori
3. Egor Gerasimov
4. Yoshihito Nishioka

Qualifying draw

First qualifier

	First Round							Qualifying Competition
	1	Botic van de Zandschulp	6
	Alt	Marc Polmans	6r
								1	Botic van de Zandschulp	5	6	6
								Alt	Evgeny Donskoy	7	3	2
	Alt	Evgeny Donskoy	6	7
	7	Mikael Ymer	2	5

Second qualifier

	First Round							Qualifying Competition
	2	Benjamin Bonzi	6	64	2
	WC	Dmitry Popko	4	77	6
								WC	Dmitry Popko	62	4
								5	Emil Ruusuvuori	77	6
	PR	Gilles Simon	0	3
	5	Emil Ruusuvuori	6	6

Third qualifier

	First Round							Qualifying Competition
	3	Federico Coria	3	4
		Radu Albot	6	6
									Radu Albot	62	4
								8	Egor Gerasimov	77	6
		Damir Džumhur	1	66
	8	Egor Gerasimov	6	78

Fourth qualifier

	First Round							Qualifying Competition
	4	Miomir Kecmanović	2	6	6
	WC	Evgeny Karlovskiy	6	4	1
								4	Miomir Kecmanović	3	6	2
								6	Yoshihito Nishioka	6	4	6
	Alt	Roman Safiullin	5	2
	6	Yoshihito Nishioka	7	6

References

• Main Draw
• Qualifying Draw