Rei Sakamoto defeated Jan Kumstát in the final, 3–6, 7–6(7–2), 7–5 to win the boys' singles tennis title at the 2024 Australian Open.

[1][2] He became the second player from Japan to win a boys' junior major title, after Shintaro Mochizuki at the 2019 Wimbledon Championships.

Alexander Blockx was the reigning champion,[3] but was no longer eligible to participate in junior events.

He received a wild card into the men's singles qualifying, where he lost to Zachary Svajda in the first round.

1 Lleyton Hewitt, and Jagger Leach, the son of three-time major champion and former WTA world no.