2023 Erste Bank Open – Singles

Jannik Sinner defeated the defending champion Daniil Medvedev in the final, 7–6(9–7), 4–6, 6–3 to win the singles tennis title at the 2023 Vienna Open. It was his tenth ATP Tour singles title.

Seeds
• # Daniil Medvedev (final)

• #🇮🇹 Jannik Sinner (champion)

• # Andrey Rublev (semifinals)

• # Stefanos Tsitsipas (semifinals)

• #🇩🇪 Alexander Zverev (quarterfinals)

• #🇺🇸 Tommy Paul (second round)

• #🇺🇸 Frances Tiafoe (quarterfinals)

• # Karen Khachanov (quarterfinals)

Seeds
• # 🇭🇺 Márton Fucsovics (withdrew)

• # 🇮🇹 Lorenzo Sonego (qualifying competition, lucky loser)

• # 🇫🇮 Emil Ruusuvuori (qualifying competition)

• # 🇭🇺 Fábián Marozsán (qualifying competition, withdrew)

• # 🇵🇪 Juan Pablo Varillas (first round)

• # 🇨🇿 Tomáš Macháč (qualified)

• # 🇫🇷 Alexandre Müller (qualified)

• # 🇪🇸 Albert Ramos Viñolas (qualified)

Qualifiers
• # 🇦🇹 Filip Misolic

• # 🇫🇷 Alexandre Müller

• # 🇨🇿 Tomáš Macháč

• # 🇪🇸 Albert Ramos Viñolas

Lucky loser

 * 1) 🇮🇹 Lorenzo Sonego