2018 US Open – Boys' Singles

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.

2018 US Open – Boys' Singles

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.