| Details | |
|---|---|
| Duration | 5 January 2004 – 12 December 2004 | 
| Edition | 27th | 
| Tournaments | 146 | 
| Achievements (singles) | |
| ← 2003   2005 → | |
The ATP Challenger Series is the second tier tour for professional tennis organised by the Association of Tennis Professionals (ATP). The 2004 calendar comprised 146 tournaments, with prize money ranging from $25,000 to $150,000. [1] [2]
| Date | Country | Tournament | Prizemoney | Surface | Singles champion | Doubles champions | 
|---|---|---|---|---|---|---|
| 05.01. |  Brazil | São Paulo Challenger I | $ 50,000 | Hard |  Juan Mónaco |  Ramón Delgado  André Sá | 
| 26.01. |  Germany | Heilbronn Open | $ 100,000 | Carpet (i) |  Gilles Elseneer |  Mariusz Fyrstenberg  Marcin Matkowski | 
|  United States | Hilton Waikoloa Village USTA Challenger | $ 50,000 | Hard |  Dmitry Tursunov |  Scott Humphries  Brian Vahaly | 
| Date | Country | Tournament | Prizemoney | Surface | Singles champion | Doubles champions | 
|---|---|---|---|---|---|---|
| 02.02. |  Poland | Wroclaw Challenger | $ 150,000 | Hard (i) |  Karol Beck |  Dominik Hrbatý  Michael Kohlmann | 
|  United States | Challenger of Dallas | $ 50,000 | Hard (i) |  Sébastien de Chaunac |  Jordan Kerr  Todd Perry | |
|  Serbia and Montenegro | Belgrade Challenger | $ 25,000 | Carpet (i) |  Nenad Zimonjić |  Branislav Sekáč  Orest Tereshchuk | |
|  Germany | Volkswagen Challenger | $ 25,000 | Carpet (i) |  Michal Tabara |  Robert Lindstedt  Jean-Claude Scherrer | |
| 09.02. |  France | Cherbourg Challenger | $ 50,000 | Hard (i) |  Julien Jeanpierre |  Michal Mertiňák  Alexander Waske | 
|  United States | Joplin Challenger | $ 50,000 | Hard (i) |  Lu Yen-hsun |  Lu Yen-hsun  Bruno Soares | |
| 16.02. |  France | Challenger 42 | $ 100,000 | Hard (i) |  Julien Benneteau |  Yves Allegro  Jean-François Bachelot | 
| 23.02. |  Vietnam | Heineken Challenger | $ 50,000 | Hard |  Arvind Parmar |  Rik de Voest  Fred Hemmes | 
| Date | Country | Tournament | Prizemoney | Surface | Singles champion | Doubles champions | 
|---|---|---|---|---|---|---|
| 05.04. |  Mexico | San Luis Potosí Challenger | $ 50,000 | Clay |  Mariano Delfino |  Tuomas Ketola  Rogier Wassen | 
|  United States | Calabasas Challenger | $ 25,000 | Hard |  Ivo Karlović |  Ilija Bozoljac  Dušan Vemić | |
| 12.04. |  Mexico | León Challenger | $ 25,000 | Hard |  Jeff Morrison |  Nathan Healey  Tuomas Ketola | 
|  Italy | Olbia Challenger | $ 25,000 | Clay |  Stefano Pescosolido |  Daniele Bracciali  Giorgio Galimberti | |
| 19.04. |  Bermuda | Bermuda Challenger | $ 100,000 | Clay |  Luis Horna |  Jordan Kerr  Tom Vanhoudt | 
|  Mexico | Mexiko City Challenger | $ 75,000 | Hard |  Florian Mayer |  Ashley Fisher  Tripp Phillips | |
|  Spain | Barcelona Challenger | $ 25,000 | Clay |  Stan Wawrinka |  Emilio Benfele Álvarez  Gabriel Trujillo Soler | |
|  Italy | Naples Challenger | $ 25,000 | Clay |  Gilles Müller |  Tomas Behrend  Giorgio Galimberti | |
| 26.04. |  France | Aix-en-Provence Challenger | $ 125,000 | Clay |  Fabrice Santoro |  Thierry Ascione  Jean-François Bachelot | 
|  Italy | Rome Challenger I | $ 25,000 | Clay |  Nicolas Coutelot |  Kornél Bardóczky  Gergely Kisgyörgy | 
| Date | Country | Tournament | Prizemoney | Surface | Singles champion | Doubles champions | 
|---|---|---|---|---|---|---|
| 04.10. |  United States | Austin Challenger | $ 50,000 | Hard |  Robert Kendrick |  André Sá  Bruno Soares | 
|  Spain | Seville Challenger | $ 37.500 | Clay |  Óscar Hernández |  Tomas Behrend  Alexander Waske | |
|  Ecuador | Quito Challenger | $ 25,000 | Clay |  Giovanni Lapentti |  Santiago González  Alejandro Hernández | |
|  Italy | Rome Challenger II | $ 25,000 | Clay |  Nicolas Coutelot |  Kornél Bardóczky  Gergely Kisgyörgy | |
| 11.10. |  United States | Tiburon Challenger | $ 50,000 | Hard |  K. J. Hippensteel |  André Sá  Bruno Soares | 
|  Spain | Barcelona Challenger | $ 25,000 | Clay |  Stan Wawrinka |  Emilio Benfele Álvarez  Gabriel Trujillo Soler | |
| 18.10. |  United States | Bolton Challenger | $ 25,000 | Hard (i) |  Marcos Baghdatis |  Jeff Coetzee  Jim Thomas | 
|  Canada | Burbank Challenger | $ 25,000 | Hard |  Kevin Kim |  Nick Rainey  Brian Wilson | 
| Date | Country | Tournament | Prizemoney | Surface | Singles champion | Doubles champions | 
|---|---|---|---|---|---|---|
| 06.12. |  Mexico | Guadalajara Challenger | $ 50,000 | Clay |  Mariano Puerta |  Santiago González  Alejandro González | 
|  Austria | Ischgl Challenger | $ 50,000 | Carpet (i) |  Dick Norman |  Leonardo Azzaro  Christopher Kas |