2019 Australian Open – Boys' singles

Lorenzo Musetti won the boys' singles tennis title at the 2019 Australian Open, defeating Emilio Nava in the final, 4–6, 6–2, 7–6(14–12). He saved a championship point in the third-set tiebreak.

Sebastian Korda was the defending champion, but was no longer eligible to participate in junior events. He received a wildcard into the men's singles qualifying competition, where he lost to Go Soeda in the first round.

Seeds
• 🇮🇹 Lorenzo Musetti (champion)

• 🇨🇳 Bu Yunchaokete (third round)

• 🇫🇮 Otto Virtanen (quarterfinals)

• 🇷🇴 Filip Cristian Jianu (semifinals)

• 🇦🇺 Rinky Hijikata (second round)

• 🇪🇸 Nicolás Álvarez Varona (quarterfinals)

• 🇨🇿 Dalibor Svrčina (third round)

• 🇨🇿 Jonáš Forejtek (third round)

• 🇺🇸 Cannon Kingsley (quarterfinals)

• 🇧🇪 Gauthier Onclin (first round)

• 🇫🇷 Valentin Royer (second round)

• 🇺🇸 Tristan Boyer (first round)

• 🇺🇸 Emilio Nava (final)

• 🇫🇷 Harold Mayot (second round)

• 🇨🇦 Liam Draxl (third round)

• 🇺🇸 Eliot Spizzirri (second round)

Qualifying
This article displays the qualifying draw for Boys' singles at the 2019 Australian Open.

Seeds
• # 🇷🇴 Cezar Crețu (qualifying competition)

• # 🇷🇺 Egor Agafonov (qualifying competition)

• # 🇷🇴 Nini Gabriel Dica (qualifying competition)

• # 🇫🇷 Lilian Marmousez (qualified)

• # Tsai Chang-lin (qualifying competition)

• # 🇮🇹 Fabrizio Andaloro (qualifying competition)

• # 🇮🇹 Filippo Moroni (first round)

• # 🇮🇹 Luciano Darderi (qualified)

• # 🇧🇷 João Ferreira (first round)

• # 🇯🇵 Tomoya Ikeda (first round)

• # 🇬🇧 James Story (qualified)

• # 🇺🇸 Blaise Bicknell (qualifying competition)

• # 🇯🇵 Ryoma Matsushita (qualified)

• # Khololwam Montsi (qualified)

• # Charl Morgan (qualifying competition)

• # Joubert Klopper (qualified)

Qualifiers
• # 🇯🇵 Ryoma Matsushita

• # 🇬🇧 James Story

• # Khololwam Montsi

• # 🇫🇷 Lilian Marmousez

• # Joubert Klopper

• # 🇯🇵 Ryuhei Azuma

• # 🇬🇧 Connor Thomson

• # 🇮🇹 Luciano Darderi