2023 NSW Open – Men's singles

Hsu Yu-hsiou was the defending champion but chose not to defend his title.

Taro Daniel won the title after defeating Marc Polmans 6–2, 6–4 in the final.

Seeds
• # 🇦🇺 Thanasi Kokkinakis (semifinals, retired)

• # 🇦🇺 Rinky Hijikata (semifinals)

• # 🇯🇵 Taro Daniel (champion)

• # 🇦🇺 James Duckworth (withdrew)

• # 🇯🇵 Shintaro Mochizuki (quarterfinals, retired)

• # 🇦🇺 Marc Polmans (final)

• # 🇰🇷 Hong Seong-chan (first round)

• # 🇦🇺 Tristan Schoolkate (first round)