Singles
2021 Erste Bank Open
Champion	Alexander Zverev
Runner-up	Frances Tiafoe
Score	7–5, 6–4
Draw	32 (4 Q / 3 WC )
Seeds	8

Andrey Rublev was the defending champion,^[1] but chose to compete in St. Petersburg instead.

Alexander Zverev won the title, defeating Frances Tiafoe in the final, 7–5, 6–4.

Seeds

Draw

Finals

	Semifinals							Final
	Q	Frances Tiafoe	3	7	6
	7	Jannik Sinner	6	5	2
								Q	Frances Tiafoe	5	4
								2	Alexander Zverev	7	6
		Carlos Alcaraz	3	3
	2	Alexander Zverev	6	6

Top half

	First round							Second round							Quarterfinals							Semifinals
	1	S Tsitsipas	78	6
		G Dimitrov	66	4				1	S Tsitsipas	6	3	4
		D Lajović	4	4				Q	F Tiafoe	3	6	6
	Q	F Tiafoe	6	6											Q	F Tiafoe	6	78
		G Monfils	77	6											8	D Schwartzman	4	66
	WC	L Musetti	62	4					G Monfils	65	6	2
		F Fognini	2	5				8	D Schwartzman	77	4	6
	8	D Schwartzman	6	7																		Q	F Tiafoe	3	7	6
	4	C Ruud	7	77																		7	J Sinner	6	5	2
		L Harris	5	62				4	C Ruud	7	4	6
		L Sonego	6	6					L Sonego	5	6	4
	LL	D Koepfer	4	3											4	C Ruud	5	1
	WC	D Novak	77	77											7	J Sinner	7	6
	Q	G Mager	64	64				WC	D Novak	4	2
		R Opelka	4	2				7	J Sinner	6	6
	7	J Sinner	6	6

Bottom half

	First round							Second round							Quarterfinals							Semifinals
	5	H Hurkacz	4	78	3
	WC	A Murray	6	66	6			WC	A Murray	3	4
		C Alcaraz	6	6					C Alcaraz	6	6
		D Evans	4	3												C Alcaraz	6	62	77
		N Basilashvili	7	4	6										3	M Berrettini	1	77	65
		P Carreño Busta	5	6	3				N Basilashvili	77	2	3
	Q	A Popyrin	63	3				3	M Berrettini	65	6	6
	3	M Berrettini	77	6																			C Alcaraz	3	3
	6	F Auger-Aliassime	6	6																		2	A Zverev	6	6
	SE	R Berankis	3	2				6	F Auger-Aliassime	2	78	6
		C Norrie	77	6					C Norrie	6	66	4
		M Fucsovics	64	1											6	F Auger-Aliassime	4	6	3
		A de Minaur	6	77											2	A Zverev	6	3	6
	Q	K Anderson	3	63					A de Minaur	2	6	2
		F Krajinović	2	5				2	A Zverev	6	3	6
	2	A Zverev	6	7

Qualifying

Qualifying draw

First qualifier

	First round							Qualifying competition
	1	Frances Tiafoe	6	3	6
		Alex Molčan	4	6	1
								1	Frances Tiafoe	65	6	6
								WC	Lucas Miedler	77	4	3
	WC	Lucas Miedler	77	6
	8	Peter Gojowczyk	64	2

Second qualifier

	First round							Qualifying competition
	2	Marcos Giron	65	4
		Norbert Gombos	77	6
									Norbert Gombos	63	77	5
								6	Alexei Popyrin	77	60	7
		Feliciano López	5	68
	6	Alexei Popyrin	7	710

Third qualifier

	First round							Qualifying competition
	3	Kevin Anderson	6	6
	Alt	Jurij Rodionov	1	4
								3	Kevin Anderson	7	4	77
								7	Roberto Carballés Baena	5	6	65
	WC	Dominic Stricker	4	6	1
	7	Roberto Carballés Baena	6	3	6

Fourth qualifier

	First round							Qualifying competition
	4	Dominik Koepfer	78	6
	Alt	Alex Bolt	66	1
								4	Dominik Koepfer	3	6	3
								5	Gianluca Mager	6	3	6
	WC	Alexander Erler	77	2	4
	5	Gianluca Mager	62	6	6

References

External links

• Main draw
• Qualifying draw