2003 Ordina Open – Men's singles

Sjeng Schalken was the defending champion and won in the final 6–3, 6–4 against Arnaud Clément.

Seeds
A champion seed is indicated in bold text while text in italics indicates the round in which that seed was eliminated.


 * 1) 🇨🇿 Jiří Novák (quarterfinals)
 * 2) 🇹🇭 Paradorn Srichaphan (second round)
 * 3)  Sjeng Schalken (champion)
 * 4)  Martin Verkerk (first round)
 * 5) 🇫🇷 Sébastien Grosjean (second round)
 * 6) 🇪🇸 Tommy Robredo (quarterfinals)
 * 7) 🇫🇷 Arnaud Clément (final)
 * 8) 🇦🇷 José Acasuso (first round)