2003 Ordina Open – Men's singlesSjeng Schalken was the defending champion and won in the final 6–3, 6–4 against Arnaud Clément.SeedsA champion seed is indicated in bold text while text in italics indicates the round in which that seed was eliminated. Jiří Novák ' Paradorn Srichaphan ' Sjeng Schalken Martin Verkerk ' Sébastien Grosjean ' Tommy Robredo ' Arnaud Clément ' José Acasuso ''''