| Boys' Singles | |
|---|---|
| 2003 US Open | |
| Champion |
|
| Runner-up |
|
| Final 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.