2019 Australian Open – Boys' singles
| Boys' singles | |
|---|---|
| 2019 Australian Open | |
| Champion | Lorenzo Musetti |
| Runner-up | Emilio Nava |
| Score | 4–6, 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.