2020 Australian Open – Boys' singles

Harold Mayot won the boys' singles tennis title at the 2020 Australian Open, defeating Arthur Cazaux in the final, 6–4, 6–1.

Lorenzo Musetti was the defending champion, but chose not to participate. He received a wildcard into the men's singles qualifying competition, where he lost to Tallon Griekspoor in the third round.

Seeds
• 🇫🇷 Harold Mayot (champion)

• 🇺🇸 Martin Damm (quarterfinals)

• 🇯🇵 Shunsuke Mitsui (second round)

• Jeffrey von der Schulenburg (first round)

• 🇫🇷 Arthur Cazaux (final)

•  Leandro Riedi (third round)

•  Dominic Stricker (quarterfinals)

•  Khololwam Montsi (second round)

• 🇮🇹 Flavio Cobolli (second round)

• 🇨🇿 Dalibor Svrčina (third round)

• 🇨🇮 Eliakim Coulibaly (first round)

•  Kārlis Ozoliņš (semifinals)

• 🇷🇴 Nicholas David Ionel (first round)

• 🇨🇳 Li Hanwen (second round)

• 🇨🇳 Bu Yunchaokete (first round)

• 🇫🇷 Térence Atmane (second round)

Seeds
• # 🇺🇸 Alexander Bernard (qualified)

• # 🇮🇹 Biagio Gramaticopolo (qualified)

• # 🇰🇿 Rostislav Galfinger (qualifying competition)

• # 🇮🇹 Fausto Tabacco (qualified)

• # 🇨🇳 Zhang Yu (qualified)

• # 🇺🇦 Viacheslav Bielinskyi (qualified)

• # 🇩🇪 Benito Sanchez Martinez (qualified)

• # 🇺🇸 Cash Hanzlik (qualified)

• # 🇨🇳 Huang Haoyuan (qualifying competition)

• # 🇸🇰 Lukáš Palovič (qualifying competition)

• # 🇦🇹 Marko Andrejic (first round)

• # Michael Francis Eala (qualifying competition)

• # 🇮🇪 Ammar Elamin (qualifying competition)

• # Francisco Llanes (qualifying competition)

• # 🇳🇿 Reece Falck (qualifying competition)

• # 🇦🇺 Casey Hoole (qualifying competition)

Qualifiers
• # 🇺🇸 Alexander Bernard

• # 🇮🇹 Biagio Gramaticopolo

• # 🇳🇿 Corban Crowther

• # 🇮🇹 Fausto Tabacco

• # 🇨🇳 Zhang Yu

• # 🇺🇦 Viacheslav Bielinskyi

• # 🇩🇪 Benito Sanchez Martinez

• # 🇺🇸 Cash Hanzlik