2023 Australian Open – Boys' singles

Bruno Kuzuhara was the reigning champion but decided to participate in the men's singles qualifying as a wild card, where he lost to Michael Mmoh in the first round.

Alexander Blockx won the title, defeating Learner Tien in the final, 6–1, 2–6, 7–6(11–9).

Seeds
• Kilian Feldbausch (quarterfinals)

• 🇧🇬 Iliyan Radulov (quarterfinals)

• 🇧🇪 Alexander Blockx (champion)

• 🇫🇷 Arthur Gea (quarterfinals)

• 🇷🇴 Mihai Alexandru Coman (second round)

• 🇯🇵 Rei Sakamoto (third round)

• 🇯🇵 Hayato Matsuoka (first round)

• 🇺🇸 Cooper Williams (third round)

• 🇨🇿 Maxim Mrva (second round)

• 🇧🇷 João Fonseca (quarterfinals)

• 🇨🇳 Zhou Yi (semifinals)

• 🇦🇺 Hayden Jones (first round)

• Danil Panarin (second round)

• 🇸🇪 Kevin Edengren (first round)

• 🇧🇬 Adriano Dzhenev (third round)

•  Abel Forger (second round)

Seeds
• # 🇺🇸 Adhithya Ganesan (qualifying competition)

• # 🇳🇿 Diego Quispe-Kim (first round)

• # 🇦🇷 Segundo Goity Zapico (qualifying competition)

• # 🇨🇦 Liam Drover-Mattinen (qualifying competition)

• # 🇯🇵 Reiya Hattori (qualified)

• # 🇸🇰 Michal Krajči (qualifying competition)

• # 🇵🇱 Goran Zgoła (qualified)

• # 🇫🇷 Jules Leroux (qualifying competition)

• # 🇰🇷 Park Seung-min (qualifying competition)

• # 🇮🇹 Lorenzo Carboni (qualified)

• # 🇨🇳 Zhang Tianhui (qualified)

• # 🇮🇹 Felipe Virgili Berini (qualified)

• # 🇺🇦 Andrii Zimnokh (qualified)

• # Ruslan Tiukaev (qualified)

• # 🇺🇸 Aayush P Bhat (qualifying competition)

• # 🇮🇳 Kriish Tyagi (qualifying competition)

Qualifiers
• # 🇺🇦 Andrii Zimnokh

• # 🇦🇺 Brendan Loh

• # 🇮🇹 Felipe Virgili Berini

• # 🇨🇳 Zhang Tianhui

• # 🇯🇵 Reiya Hattori

• # Ruslan Tiukaev

• # 🇵🇱 Goran Zgoła

• # 🇮🇹 Lorenzo Carboni