2018 US Open – Boys' singles

Boys' singles
2018 US Open
Champion Thiago Seyboth Wild
Runner-up Lorenzo Musetti
Score6–1, 2–6, 6–2

Wu Yibing was the defending champion, but was no longer eligible to participate in junior tournaments.

Thiago Seyboth Wild won the title, defeating Lorenzo Musetti in the final, 6–1, 2–6, 6–2.