The 2023 Erste Bank Open was a men's tennis tournament played on indoor hard courts. It was the 49th edition of the event, and part of the ATP Tour 500 series of the 2023 ATP Tour. It was held at the Wiener Stadthalle in Vienna, Austria, from 23 until 29 October 2023.
Champions
Singles
Jannik Sinner def. Daniil Medvedev, 7–6(9–7), 4–6, 6–3
It was Sinner's 4th title of the year and the 10th of his career.
Doubles
Rajeev Ram / Joe Salisbury def. Nathaniel Lammons / Jackson Withrow, 6–4, 5–7, [12–10]
Points and prize money
Point distribution
Prize money
*per team
Singles main-draw entrants
Seeds
1 Rankings as of 16 October 2023
Other entrants
The following players received wildcards into the singles main draw: Borna Gojo Sebastian Ofner Dominic Thiem
The following player received entry into the singles main draw as a special exempt: Aslan Karatsev
The following player using a protected ranking into the singles main draw: Gaël Monfils
The following players received entry from the qualifying draw: Tomáš Macháč Filip Misolic Alexandre Müller Albert Ramos Viñolas
The following player received entry as a lucky loser: Lorenzo Sonego
Withdrawals
Matteo Berrettini → replaced by Daniel Altmaier
Pablo Carreño Busta → replaced by Aleksandar Vukic
Borna Ćorić → replaced by Matteo Arnaldi
Mackenzie McDonald → replaced by Lorenzo Sonego
Doubles main draw entrants
Seeds
1 Rankings as of 16 October 2023
Other entrants
The following pairs received wildcards into the doubles main draw: Romain Arneodo / Sam Weissborn Sebastian Ofner / Philipp Oswald
The following pair received entry from the qualifying draw: Francisco Cabral / Henry Patten
The following pairs received entry as lucky losers: Gonzalo Escobar / Aleksandr Nedovyesov Neil Oberleitner / Jurij Rodionov
Withdrawals
Rohan Bopanna / Matthew Ebden → replaced by Sadio Doumbia / Fabien Reboul
Dan Evans / Ben Shelton → replaced by Gonzalo Escobar / Aleksandr Nedovyesov
Mackenzie McDonald / Marcelo Melo → replaced by Neil Oberleitner / Jurij Rodionov