2023 ASB Classic – Men's singles

Richard Gasquet defeated Cameron Norrie in the final, 4–6, 6–4, 6–4 to win the men's singles tennis title at the 2023 ASB Classic. It was his 16th ATP Tour singles title, and his first since 2018.

Ugo Humbert was the defending champion from when the event was last held in 2020, but lost in the first round to Christopher Eubanks.

Seeds
The top four seeds received a bye into the second round. • #🇳🇴 Casper Ruud (second round)

• #🇬🇧 Cameron Norrie (final)

• #🇦🇷 Diego Schwartzman (second round, retired)

• #🇦🇷 Francisco Cerúndolo (withdrew)

• #🇰🇿 Alexander Bublik (first round)

• #🇺🇸 John Isner (first round)

• #🇦🇷 Sebastián Báez (first round)

• #🇫🇷 Adrian Mannarino (first round)

Seeds
• # 🇧🇷 Thiago Monteiro (qualified)

• # 🇦🇷 Federico Coria (qualifying competition, lucky loser)

• # 🇷🇸 Dušan Lajović (first round)

• # 🇨🇿 Jiří Lehečka (qualified)

• # João Sousa (qualifying competition, lucky loser)

• # 🇦🇷 Facundo Bagnis (qualifying competition)

• # 🇫🇷 Grégoire Barrère (qualified)

• # 🇯🇵 Taro Daniel (first round)

Qualifiers
• # 🇧🇷 Thiago Monteiro

• # 🇫🇷 Grégoire Barrère

• # 🇺🇸 Christopher Eubanks

• # 🇨🇿 Jiří Lehečka

Lucky losers
• # 🇦🇷 Federico Coria

• # João Sousa