2023 Erste Bank Open

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.

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]

Prize money

 * per team

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

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