Vienna Open 2004
Feliciano Lopez won the title, beating Guillermo Canas 6–4 1–6 7–5 3–6 7–5 in the final.
Main draw 32 players
- 1🇦🇷David NalbandianQuarterfinals · Lost to Guillermo Canas
- 2🇨🇱Nicolas MassuQuarterfinals · Lost to Davide Sanguinetti
- 3🇩🇪Rainer SchuettlerQuarterfinals · Lost to Feliciano Lopez
- 4🇦🇷Juan Ignacio ChelaRound of 32 · Lost to Florian Mayer
- 5🇹🇭Paradorn SrichaphanRound of 16 · Lost to Robby Ginepri
- 6🇦🇷Guillermo CanasFinal · Lost to Feliciano Lopez
- 8🇪🇸Feliciano LopezFinal · Champion
- 🇮🇹Davide SanguinettiSemifinals · Lost to Feliciano Lopez
- 🇩🇪Tommy HaasSemifinals · Lost to Guillermo Canas
- 🇺🇸Robby GinepriQuarterfinals · Lost to Tommy Haas
- WC🇦🇹Alexander PeyaRound of 16 · Lost to Davide Sanguinetti
- 🇨🇿Bohdan UlihrachRound of 16 · Lost to Feliciano Lopez
- 🇩🇪Florian MayerRound of 16 · Lost to Tommy Haas
- 🇵🇪Luis HornaRound of 16 · Lost to Rainer Schuettler
- Q🇿🇦Rik De VoestRound of 16 · Lost to Nicolas Massu
- 🇦🇹Stefan KoubekRound of 16 · Lost to David Nalbandian
- 🇺🇸Taylor DentRound of 16 · Lost to Guillermo Canas
- 🇦🇷Agustin CalleriRound of 32 · Lost to Feliciano Lopez
- 🇪🇸Albert CostaRound of 32 · Lost to Paradorn Srichaphan
- 🇪🇸Alberto Martin#359Round of 32 · Lost to Stefan Koubek
- Q🇮🇹Andreas SeppiRound of 32 · Lost to David Nalbandian
- 🇪🇸David FerrerRound of 32 · Lost to Luis Horna
- LL🇺🇸Glenn WeinerRound of 32 · Lost to Alexander Peya
- 🇷🇸Janko TipsarevicRound of 32 · Lost to Rik De Voest
- WC🇦🇹Julian KnowleRound of 32 · Lost to Guillermo Canas
- 🇦🇹Jurgen MelzerRound of 32 · Lost to Rainer Schuettler
- Q🇸🇰Karol KuceraRound of 32 · Lost to Nicolas Massu
- WC🇦🇹Konstantin Don GruberRound of 32 · Lost to Taylor Dent
- 🇦🇷Mariano ZabaletaRound of 32 · Lost to Davide Sanguinetti
- 🇮🇹Potito StaraceRound of 32 · Lost to Robby Ginepri
- 🇸🇪Thomas EnqvistRound of 32 · Lost to Bohdan Ulihrach
- Q🇿🇦Wesley MoodieRound of 32 · Lost to Tommy Haas