2019 Australian Open – Boys' singles

Boys' singles
2019 Australian Open
Champion Lorenzo Musetti
Runner-up Emilio Nava
Score4–6, 6–2, 7–6(14–12)

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.