2009 US Open – Boys' singles
| Boys' singles | |
|---|---|
| 2009 US Open | |
| Champion | Bernard Tomic |
| Runner-up | Chase Buchanan |
| Score | 6–1, 6–3 |
Grigor Dimitrov was the defending champion, but did not compete in the Juniors this year.
Bernard Tomic won in the final 6–1, 6–3 against Chase Buchanan.