2021 Erste Bank Open

Main article: Vienna Open

The 2021 Erste Bank Open was a men's tennis tournament played on indoor hard courts. It was the 47th edition of the event, and part of the ATP Tour 500 Series of the 2021 ATP Tour. It was held at the Wiener Stadthalle in Vienna, Austria, from 25 until 31 October 2021. Second-seeded Alexander Zverev won the singles title.^[3]

2021 Erste Bank Open
Date	25–31 October
Edition	47th
Category	ATP Tour 500 Series
Draw	32S / 16D
Prize money	€1,952,015
Surface	Hard (indoor)
Location	Vienna, Austria
Venue	Wiener Stadthalle
Champions
Singles
Alexander Zverev[1]
Doubles
Juan Sebastián Cabal / Robert Farah[2]

Finals

Singles

Main article: 2021 Erste Bank Open – Singles

• Alexander Zverev def. Frances Tiafoe, 7–5, 6–4

Doubles

Main article: 2021 Erste Bank Open – Doubles

• Juan Sebastián Cabal / Robert Farah def. Rajeev Ram / Joe Salisbury, 6–4, 6–2

Singles main-draw entrants

Seeds

Country	Player	Rank1	Seed
GRE	Stefanos Tsitsipas	3	1
GER	Alexander Zverev	4	2
ITA	Matteo Berrettini	7	3
NOR	Casper Ruud	9	4
POL	Hubert Hurkacz	10	5
CAN	Félix Auger-Aliassime	12	6
ITA	Jannik Sinner	13	7
ARG	Diego Schwartzman	14	8

• Rankings are as of October 18, 2021^[4]

Other entrants

The following players received wildcards into the singles main draw:

• Andy Murray^[5]
• Lorenzo Musetti
• Dennis Novak^[6]

The following player received entry using a special exempt:

• Ričardas Berankis

The following players received entry from the qualifying draw:

• Kevin Anderson
• Gianluca Mager
• Alexei Popyrin
• Frances Tiafoe

The following player received entry as a lucky loser:

• Dominik Koepfer

Withdrawals

Before the tournament

• Cristian Garín → replaced by Dominik Koepfer
• Ugo Humbert → replaced by Márton Fucsovics

Doubles main-draw entrants

Seeds

Country	Player	Country	Player	Rank1	Seed
CRO	Nikola Mektić	CRO	Mate Pavić	3	1
USA	Rajeev Ram	GBR	Joe Salisbury	7	2
AUS	John Peers	SVK	Filip Polášek	22	3
COL	Juan Sebastián Cabal	COL	Robert Farah	27	4

• Rankings are as of 18 October 2021

Other entrants

The following pairs received wildcards into the doubles main draw:

• Feliciano López / Stefanos Tsitsipas
• Oliver Marach / Philipp Oswald

The following pair received entry from the qualifying draw:

• Alexander Erler / Lucas Miedler

The following pair received entry as lucky losers:

• Sander Gillé / Dominik Koepfer

Withdrawals

Before the tournament

• Cristian Garín / Cameron Norrie → replaced by Sander Gillé / Dominik Koepfer
• Kevin Krawietz / Horia Tecău → replaced by Lloyd Harris / Horia Tecău