2003 Adidas International – Men's Singles
was the defending champion but lost in the first round to Franco Squillari.
Hyung-Taik Lee won in the final 4–6, 7–6, 7–6 against Juan Carlos Ferrero.Seeds
A champion seed is indicated in bold text while text in italics indicates the round in which that seed was eliminated.
- Marat Safin '
- Juan Carlos Ferrero '
- Carlos Moyá '
- Roger Federer '
- Albert Costa '
- Andy Roddick '
- Paradorn Srichaphan '
- Gastón Gaudio '
Draw