2004 Ordina Open – Men's singles

Sjeng Schalken was the defending champion, but lost in the first round this year.

Michaël Llodra won the title, beating Guillermo Coria 6–3, 6–4 in the final.

Seeds
• # 🇦🇷 Guillermo Coria (final)

• # 🇩🇪 Rainer Schüttler (first round)

• # Sjeng Schalken (first round)

• # 🇪🇸 Tommy Robredo (semifinals)

• # 🇸🇰 Dominik Hrbatý (first round)

• # 🇷🇺 Mikhail Youzhny (second round, retired because of a virus infection)

• # 🇫🇷 Arnaud Clément (quarterfinals)

• # 🇪🇸 Fernando Verdasco (quarterfinals)