Cincinnati Open 2004
Andre Agassi won the title, beating Lleyton Hewitt 6–3 3–6 6–2 in the final.
Main draw 64 players
- 1🇨🇭Roger FedererRound of 64 · Lost to Dominik Hrbaty
- 2🇺🇸Andy RoddickSemifinals · Lost to Andre Agassi
- 4🇪🇸Carlos MoyaQuarterfinals · Lost to Andre Agassi
- 5🇬🇧Tim HenmanRound of 16 · Lost to Lleyton Hewitt
- 7🇪🇸Juan Carlos FerreroRound of 32 · Lost to Tommy Robredo
- 8🇩🇪Rainer SchuettlerRound of 64 · Lost to Tommy Haas
- 9🇦🇷Gaston GaudioRound of 32 · Lost to Greg Rusedski
- 10🇦🇺Lleyton HewittFinal · Lost to Andre Agassi
- 11🇺🇸Andre AgassiFinal · Champion
- 12🇫🇷Sebastien GrosjeanRound of 64 · Lost to Robin Soderling
- 13🇨🇱Nicolas MassuRound of 64 · Lost to Mikhail Youzhny
- 14🇷🇺Marat SafinQuarterfinals · Lost to Lleyton Hewitt
- 15🇹🇭Paradorn SrichaphanRound of 16 · Lost to Andy Roddick
- 16🇷🇴Andrei PavelRound of 64 · Lost to Wayne Arthurs
- 17🇦🇷Juan Ignacio ChelaRound of 16 · Lost to Andre Agassi
- 🇪🇸Tommy RobredoSemifinals · Lost to Lleyton Hewitt
- 🇫🇷Fabrice SantoroQuarterfinals · Lost to Tommy Robredo
- WC🇩🇪Tommy HaasQuarterfinals · Lost to Andy Roddick
- Q🇬🇧Greg RusedskiRound of 16 · Lost to Tommy Robredo
- Q🇭🇷Ivo KarlovicRound of 16 · Lost to Marat Safin
- 🇸🇪Jonas BjorkmanRound of 16 · Lost to Fabrice Santoro
- 🇸🇪Robin SoderlingRound of 16 · Lost to Tommy Haas
- LL🇦🇺Wayne ArthursRound of 16 · Lost to Carlos Moya
- 🇸🇰Dominik HrbatyRound of 32 · Lost to Jonas Bjorkman
- 🇪🇸Feliciano LopezRound of 32 · Lost to Ivo Karlovic
- 🇨🇱Fernando GonzalezRound of 32 · Lost to Juan Ignacio Chela
- 🇧🇷Gustavo KuertenRound of 32 · Lost to Lleyton Hewitt
- 🇲🇦Hicham AraziRound of 32 · Lost to Tim Henman
- 🇭🇷Ivan LjubicicRound of 32 · Lost to Carlos Moya
- WC🇺🇸Jeff MorrisonRound of 32 · Lost to Marat Safin
- 🇵🇪Luis HornaRound of 32 · Lost to Robin Soderling
- 🇦🇷Mariano ZabaletaRound of 32 · Lost to Wayne Arthurs
- 🇷🇺Mikhail YouzhnyRound of 32 · Lost to Fabrice Santoro
- 🇩🇪Nicolas KieferRound of 32 · Lost to Andy Roddick
- 🇦🇲Sargis SargsianRound of 32 · Lost to Tommy Haas
- 🇳🇱Sjeng SchalkenRound of 32 · Lost to Paradorn Srichaphan
- 🇸🇪Thomas JohanssonRound of 32 · Lost to Andre Agassi
- WC🇷🇺Alex Bogomolov JrRound of 64 · Lost to Lleyton Hewitt
- 🇫🇷Arnaud ClementRound of 64 · Lost to Juan Carlos Ferrero
- Q🇬🇧Arvind ParmarRound of 64 · Lost to Carlos Moya
- 🇪🇸David FerrerRound of 64 · Lost to Paradorn Srichaphan
- Q🇧🇪Dick NormanRound of 64 · Lost to Sjeng Schalken
- Q🇷🇺Dmitry TursunovRound of 64 · Lost to Fernando Gonzalez
- 🇪🇸Fernando VerdascoRound of 64 · Lost to Luis Horna
- LL🇫🇷Gregory CarrazRound of 64 · Lost to Thomas Johansson
- 🇬🇪Irakli LabadzeRound of 64 · Lost to Jonas Bjorkman
- WC🇺🇸Jan Michael GambillRound of 64 · Lost to Gaston Gaudio
- 🇨🇿Jiri NovakRound of 64 · Lost to Marat Safin
- 🇸🇪Joachim JohanssonRound of 64 · Lost to Nicolas Kiefer
- 🇦🇹Jurgen MelzerRound of 64 · Lost to Jeff Morrison
- 🇺🇸Mardy FishRound of 64 · Lost to Andre Agassi
- 🇧🇾Max MirnyiRound of 64 · Lost to Andy Roddick
- 🇫🇷Michael LlodraRound of 64 · Lost to Mariano Zabaleta
- Q🇨🇭Michel KratochvilRound of 64 · Lost to Sargis Sargsian
- 🇪🇸Rafael NadalRound of 64 · Lost to Juan Ignacio Chela
- 🇺🇸Robby GinepriRound of 64 · Lost to Fabrice Santoro
- 🇺🇸Taylor DentRound of 64 · Lost to Tommy Robredo
- 🇸🇪Thomas EnqvistRound of 64 · Lost to Greg Rusedski
- LL🇦🇺Todd ReidRound of 64 · Lost to Feliciano Lopez
- 🇺🇸Vincent SpadeaRound of 64 · Lost to Hicham Arazi
- Q🇿🇦Wesley MoodieRound of 64 · Lost to Ivo Karlovic
- 🇧🇪Xavier MalisseRound of 64 · Lost to Ivan Ljubicic
- Q🇹🇼Yen Hsun LuRound of 64 · Lost to Gustavo Kuerten
- 🇲🇦Younes El AynaouiRound of 64 · Lost to Tim Henman