Alexander Blockx won the boys' singles title at the 2023 Australian Open, defeating Learner Tien in the final, 6–1, 2–6, 7–6(11–9).

[1] Bruno Kuzuhara 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 Michael Mmoh in the first round.

[2]