2018 US Open – Boys' singles
| Boys' singles | |
|---|---|
| 2018 US Open | |
| Champion | Thiago Seyboth Wild |
| Runner-up | Lorenzo Musetti |
| Score | 6–1, 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.