2003 US Open – Boys' singles
| Boys' singles | |
|---|---|
| 2003 US Open | |
| Champion | Jo-Wilfried Tsonga |
| Runner-up | Marcos Baghdatis |
| Score | 7–6(7–4), 6–3 |
Richard Gasquet was the defending champion, but did not compete in the juniors that year.
Jo-Wilfried Tsonga won the tournament, defeating Marcos Baghdatis in the final, 7–6(7–4), 6–3.