2004 Open de Moselle – Singles

Arnaud Clément was the defending champion, but lost in the quarterfinals to Jérôme Haehnel.

Haehnel, who entered the tournament as a qualifier, won the title by defeating Richard Gasquet 7–6(11–9), 6–4 in the final.

Seeds
• # Ivan Ljubičić (quarterfinals)

• # 🇧🇪 Xavier Malisse (first round, retired)

• # 🇦🇷 José Acasuso (first round)

• # 🇧🇪 Olivier Rochus (first round)

• # 🇦🇷 Juan Mónaco (first round)

• # 🇫🇷 Julien Benneteau (second round)

• # Dennis van Scheppingen (first round)

• # 🇱🇺 Gilles Müller (first round)