2023 Adelaide International 1 – Men's singles

Novak Djokovic defeated Sebastian Korda in the final, 6–7(8–10), 7–6(7–3), 6–4 to win the men's singles title at the 2023 Adelaide International 1. He saved a championship point en route to his 92nd ATP Tour singles title, equaling Rafael Nadal's tally for the fourth-most men's singles titles in the Open Era.

Gaël Monfils was the reigning champion, but chose not to participate this year.

Seeds
• # 🇷🇸 Novak Djokovic (champion)

• # 🇨🇦 Félix Auger-Aliassime (first round)

• # Daniil Medvedev (semifinals)

• # Andrey Rublev (first round)

• # Holger Rune (first round)

• # 🇮🇹 Jannik Sinner (quarterfinals)

• # 🇨🇦 Denis Shapovalov (quarterfinals)

• # Karen Khachanov (quarterfinals)

Seeds
• # 🇰🇷 Kwon Soon-woo (qualified)

• # 🇫🇷 Ugo Humbert (first round)

• # Roman Safiullin (qualified)

• # 🇫🇷 Grégoire Barrère (first round)

• # 🇯🇵 Taro Daniel (qualifying competition)

• # 🇺🇸 Ben Shelton (first round)

• # 🇨🇦 Vasek Pospisil (qualifying competition)

• # 🇨🇳 Zhang Zhizhen (first round)

Qualifiers
• # 🇰🇷 Kwon Soon-woo

• # 🇦🇺 Alexei Popyrin

• # Roman Safiullin

• # 🇦🇺 Rinky Hijikata