2023 Adelaide International 2 – Men's singles

Kwon Soon-woo defeated Roberto Bautista Agut in the final, 6–4, 3–6, 7–6(7–4) to win the men's singles tennis title at the 2023 Adelaide International 2. It was his second ATP Tour singles title, and he became just the tenth man in ATP Tour history to win a title as a lucky loser.

Thanasi Kokkinakis was the defending champion, but lost in the semifinals to Bautista Agut.

Seeds
The top four seeds received a bye into the second round. • # Andrey Rublev (second round)

• #🇪🇸 Pablo Carreño Busta (second round)

• # Karen Khachanov (quarterfinals)

• #🇪🇸 Roberto Bautista Agut (final)

• #🇬🇧 Dan Evans (first round)

• #🇷🇸 Miomir Kecmanović (quarterfinals)

• #🇪🇸 Alejandro Davidovich Fokina (quarterfinals)

• #🇺🇸 Tommy Paul (second round)

Seeds
• # 🇨🇴 Daniel Elahi Galán (withdrew due to abdominal injury)

• # 🇸🇪 Mikael Ymer (qualified)

• # 🇪🇸 Bernabé Zapata Miralles (first round)

• # 🇩🇪 Oscar Otte (first round)

• # 🇦🇺 Christopher O'Connell (qualifying competition, lucky loser)

• # 🇦🇷 Tomás Martín Etcheverry (qualified)

• # 🇰🇷 Kwon Soon-woo (qualifying competition, lucky loser)

• # 🇦🇺 Jordan Thompson (qualifying competition)

Qualifiers
• # 🇦🇷 Tomás Martín Etcheverry

• # 🇸🇪 Mikael Ymer

• # 🇦🇺 John Millman

• # 🇨🇿 Tomáš Macháč

Lucky losers
• # 🇦🇺 Christopher O'Connell

• # 🇰🇷 Kwon Soon-woo

• # Robin Haase