2004 Open de Tenis Comunidad Valenciana – Singles

Juan Carlos Ferrero was the defending champion but lost in the semifinals to Fernando Verdasco.

Verdasco won in the final 7–6(7–5), 6–3 against Albert Montañés.

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


 * 1) 🇪🇸 Juan Carlos Ferrero (semifinals)
 * 2) 🇪🇸 Feliciano López (second round)
 * 3)  Ivan Ljubičić (second round)
 * 4) 🇪🇸 Albert Costa (second round)
 * 5) 🇪🇸 David Sánchez (first round)
 * 6) 🇪🇸 Alberto Martín (semifinals)
 * 7) 🇪🇸 David Ferrer (quarterfinals)
 * 8) 🇪🇸 Rubén Ramírez Hidalgo (second round)