The ATP Challenger Series is the second tier tour for professional tennis organised by the Association of Tennis Professionals (ATP). The 2003 ATP Challenger Series calendar comprised 135 tournaments, with prize money ranging from $25,000 up to $150,000.^[1][2]

Date	Country	Tournament	Prizemoney	Surface	Singles champion	Doubles champions
30.12. 2002	Brazil	Aberto de São Paulo	$ 025,000	Hard	Flávio Saretta	Federico Browne Rogier Wassen
20.01	Germany	Heilbronn Open	$ 100,000	Carpet (i)	Karol Beck	Simon Aspelin Johan Landsberg
	United States	Hilton Waikoloa Village USTA Challenger	$ 037.500	Hard	Robby Ginepri	Diego Ayala Robert Kendrick
20.01	United States	Challenger of Dallas	$ 050,000	Hard (i)	Simon Greul	Justin Gimelstob Scott Humphries
	Germany	Warsteiner Challenger	$ 025,000	Carpet (i)	Mario Ančić	Aleksandar Kitinov Magnus Larsson

Date	Country	Tournament	Prizemoney	Surface	Singles champion	Doubles champions
03.02.	Poland	KGHM Polish Indoors	$ 150,000	Hard (i)	Karol Kučera	Petr Luxa David Škoch
	United States	Joplin Challenger	$ 050,000	Hard (i)	Bob Bryan	Martín García Graydon Oliver
	Yugoslavia	Belgrad Challenger	$ 025,000	Carpet (i)	Dennis van Scheppingen	Ilija Bozoljac Nenad Zimonjić
10.02.	Germany	Warsteiner Challenger Lübeck	$ 025,000	Carpet (i)	Alexander Waske	Ota Fukárek Jordan Kerr
17.02.	France	Challenger 42	$ 100,000	Hard (i)	Thierry Ascione	David Škoch Lovro Zovko
	Germany	Volkswagen Challenger	$ 025,000	Carpet (i)	Axel Pretzsch	Karsten Braasch Axel Pretzsch
24.02.	France	Challenger Ford de Cherbourg-Octeville	$ 050,000	Hard (i)	Sergio Roitman	Benjamin Cassaigne Rik de Voest
	Great Britain	Wrexham Challenger	$ 025,000	Hard	Wesley Moodie	Daniele Bracciali Federico Luzzi

Date	Country	Tournament	Prizemoney	Surface	Singles champion	Doubles champions
03.03.	France	Besançon Challenger	$ 037.500	Hard (i)	Cyril Saulnier	Jonathan Erlich Julian Knowle
	Japan	Shimadzu All Japan Indoor Tennis Championships	$ 025,000	Carpet (i)	Michal Tabara	Amir Hadad Andy Ram
10.03.	Vietnam	Heineken Challenger	$ 050,000	Hard	Amir Hadad	Rik de Voest Wesley Moodie
	Ecuador	Abierto Internacional de Salinas	$ 025,000	Hard	Giovanni Lapentti	Martín García Sebastián Prieto
	Slovakia	Sarajevo Challenger	$ 025,000	Hard (i)	Richard Gasquet	Tomáš Berdych Jaroslav Levinský
	Australia	Hobart Challenger	$ 025,000	Hard	Satoshi Iwabuchi	Federico Browne Rogier Wassen
17.03.	Italy	Cagliari Challenger	$ 025,000	Clay	Filippo Volandri	Álex López Morón Andrés Schneiter
24.03.	Italy	Torneo Internazionale di Tennis Città della Disfida Open	$ 025,000	Clay	Rafael Nadal	Sebastián Prieto Sergio Roitman

Date	Country	Tournament	Prizemoney	Surface	Singles champion	Doubles champions
07.04.	United States	Calabasas Challenger	$ 050,000	Hard	Jérôme Golmard	Justin Gimelstob Scott Humphries
	Italy	Sanremo Challenger	$ 025,000	Clay	Tomas Behrend	Daniele Bracciali Amir Hadad
14.04.	Bermuda	XL Bermuda Open	$ 100,000	Clay	Flávio Saretta	Robert Kendrick Mark Merklein
	Mexico	San Luis Potosí Challenger	$ 050,000	Clay	Dick Norman	Alex Bogomolov Jr. Frédéric Niemeyer
21.04.	India	Indian Oil Servo ATP Challenger Bangalore	$ 025,000	Hard	Grégory Carraz	Rodolphe Cadart Grégory Carraz
	Mexico	León Challenger	$ 025,000	Hard	Alex Bogomolov Jr.	Ota Fukárek Jordan Kerr
	Italy	Naples Challenger	$ 025,000	Clay	Richard Gasquet	Massimo Bertolini Giorgio Galimberti
28.04.	France	Aix-en-Provence Challenger	$ 125,000	Clay	Mariano Puerta	Stephen Huss Myles Wakefield
	India	Indian Oil Servo ATP Challenger New Delhi	$ 025,000	Hard	Ivo Heuberger	Radoslav Lukaev Dmitry Vlasov
	Italy	Rome Challenger	$ 025,000	Clay	Giorgio Galimberti	Amir Hadad Martín Vassallo Argüello

Date	Country	Tournament	Prizemoney	Surface	Singles champion	Doubles champions
05.05.	United States	Birmingham Challenger	$ 050,000	Clay	Óscar Hernández	Josh Goffi Travis Parrott
12.05.	United States	Forest Hills Challenger	$ 050,000	Clay	Alex Bogomolov Jr.	Justin Gimelstob Scott Humphries
	Croatia	Zagreb Open	$ 050,000	Clay	Kristof Vliegen	Lucas Arnold Ker Mariano Hood
	Uzbekistan	Fergana Challenger	$ 025,000	Hard	Tuomas Ketola	Justin Bower Aisam-ul-Haq Qureshi
	Slovakia	Košice Challenger	$ 025,000	Clay	Martín Vassallo Argüello	Stephen Huss Myles Wakefield
19.05.	Czech Republic	ECM Prague Open	$ 100,000	Clay	Sjeng Schalken	Tomáš Berdych Michal Navrátil
	Hungary	Budapest Challenger I	$ 025,000	Clay	Johan Settergren	Ignacio González King Juan Pablo Guzmán
26.05.	Slovenia	Ljubljana Challenger	$ 025,000	Clay	Jiří Vaněk	Leonardo Azzaro Gergely Kisgyörgy
	Italy	Turin Challenger	$ 025,000	Clay	Óscar Serrano	Emilio Benfele Álvarez Gabriel Trujillo Soler

Date	Country	Tournament	Prizemoney	Surface	Singles champion	Doubles champions
02.06.	Czech Republic	Unicredit Czech Open	$ 125,000	Clay	Radek Štěpánek	Jaroslav Levinský David Škoch
	Germany	Schickedanz Open	$ 050,000	Clay	Jan Frode Andersen	Denis Gremelmayr Simon Greul
	Great Britain	Surbiton Trophy	$ 050,000	Grass	Wesley Moodie	Joshua Eagle Andrew Kratzmann
	United States	Tallahassee Challenger	$ 050,000	Hard	Paul Goldstein	Not completed
	Italy	Sassuolo Challenger	$ 025,000	Clay	Mariano Albert-Ferrando	Paul Baccanello Stefano Galvani
09.06.	Italy	Biella Challenger	$ 100,000	Clay	Filippo Volandri	Stefano Galvani Martín Vassallo Argüello
	Germany	ATU Cup	$ 050,000	Clay	Tomas Behrend	Mariano Delfino Patricio Rudi
	United States	Atlantic City Challenger	$ 025,000	Hard	Björn Rehnquist	Tripp Phillips Ryan Sachire
	South Korea	Busan Challenger	$ 025,000	Hard	Kim Young-jun	Toshihide Matsui Michihisa Onoda
16.06.	Germany	Nord/LB Open	$ 125,000	Clay	Werner Eschauer	Sebastián Prieto Jim Thomas
	Switzerland	Lugano Challenger	$ 050,000	Clay	Diego Moyano	Joan Balcells Juan Albert Viloca
23.06.	Andorra	Andorra Challenger	$ 025,000	Hard (i)	Grégory Carraz	Rik de Voest Tuomas Ketola
	Italy	Reggio Emilia Challenger	$ 025,000	Clay	Richard Gasquet	Joseph Sirianni Rogier Wassen
30.06.	Slovakia	Košice Challenger	$ 100,000	Clay	Martín Vassallo Argüello	Stephen Huss Myles Wakefield
	Spain	Pozoblanco Challenger	$ 075,000	Hard	Stefano Pescosolido	Brandon Coupe Noam Okun
	Italy	Mantua Challenger	$ 025,000	Clay	Vincenzo Santopadre	Enzo Artoni Martín Vassallo Argüello
	France	Montauban Challenger	$ 025,000	Clay	Juan Pablo Guzmán	Fred Hemmes Rogier Wassen
	Germany	Internationale Badische Meisterschaften um den Techem Cup – Zell	$ 025,000	Clay	Janko Tipsarević	Karsten Braasch Franz Stauder

Date	Country	Tournament	Prizemoney	Surface	Singles champion	Doubles champions
07.07.	Canada	Granby Challenger	$ 050,000	Hard	Frank Dancevic	Lu Yen-hsun Danai Udomchoke
	Netherlands	Scheveningen Challenger	$ 050,000	Clay	Todd Larkham	Fred Hemmes Edwin Kempes
	Great Britain	West of England Challenger	$ 025,000	Grass	Massimo Dell'Acqua	Jean-François Bachelot Nicolas Mahut
	Germany	Oberstaufen Cup	$ 025,000	Clay	Martín Vassallo Argüello	Kornél Bardóczky Gergely Kisgyörgy
14.07.	Finland	Helsinki Challenger I	$ 125,000	Clay (i)	Davide Sanguinetti	Robert Lindstedt Robin Söderling
	United States	Aptos Challenger	$ 050,000	Hard	Jeff Salzenstein	Jan Hernych Uros Vico
	Hungary	Budaörs Challenger	$ 050,000	Clay	Tomáš Berdych	Leonardo Azzaro Gergely Kisgyörgy
	Great Britain	Manchester Challenger	$ 025,000	Grass	Nicolas Mahut	Martin Lee Arvind Parmar
	Italy	Olbia Challenger	$ 025,000	Clay	Nicolás Almagro	Alessio di Mauro Vincenzo Santopadre
	Russia	Togliatti Cup	$ 025,000	Hard	Dudi Sela	Jun Kato Alexander Peya
21.07.	Brazil	Campos do Jordão Challenger	$ 075,000	Hard	Giovanni Lapentti	Rik de Voest Giovanni Lapentti
	Netherlands	Hilversum Challenger	$ 075,000	Clay	Martin Verkerk	Mariusz Fyrstenberg Marcin Matkowski
	Great Britain	Lexington Challenger	$ 050,000	Hard	Frank Dancevic	Jonathan Erlich Takao Suzuki
	Finland	Tampere Challenger	$ 050,000	Clay	Robin Söderling	Igor Andreev Dmitry Vlasov
	Spain	Valladolid Challenger	$ 037.500	Hard	Gilles Müller	Jun Kato Łukasz Kubot
	Italy	Recanati Challenger	$ 025,000	Hard	Daniele Bracciali	Manuel Jorquera Frank Moser
28.07.	Spain	Segovia Challenger	$ 100,000	Hard	Rafael Nadal	Ota Fukárek Tripp Phillips
	Brazil	Belo Horizonte Challenger	$ 025,000	Hard	Julio Peralta	Marcos Daniel Alexandre Simoni
	United States	Denver Challenger	$ 025,000	Hard	Arvind Parmar	Rohan Bopanna Aisam-ul-Haq Qureshi
	Russia	St. Petersburg Challenger	$ 025,000	Clay	Florian Mayer	Mikhail Elgin Orest Tereshchuk
	Italy	Trani Challenger	$ 025,000	Clay	Martín Vassallo Argüello	Mariano Delfino Matias O'Neille

Date	Country	Tournament	Prizemoney	Surface	Singles champion	Doubles champions
04.08.	San Marino	San Marino Challenger	$ 100,000	Clay	Alessio di Mauro	Massimo Bertolini Tom Vanhoudt
	United States	Binghamton Professional Tennis Tournament	$ 050,000	Hard	Ivo Karlović	Jonathan Erlich Andy Ram
	Russia	Mordovia Challenger	$ 025,000	Clay	Martin Štěpánek	Kornél Bardóczky Martin Štěpánek
	Uzbekistan	Samarkand Challenger	$ 025,000	Clay	Daniel Köllerer	Viktor Bruthans Sergiy Stakhovsky
11.08.	United States	Bronx Challenger	$ 050,000	Hard	Ivo Karlović	Julien Benneteau Nicolas Mahut
	Uzbekistan	Bukhara Challenger	$ 025,000	Hard	Marc-Kevin Goellner	Alexey Kedryuk Vadim Kutsenko
	Austria	Graz Challenger	$ 025,000	Hard	Tomáš Berdych	Noam Behr Ota Fukárek
	Italy	Banca Marche Tennis Cup	$ 025,000	Clay	Stan Wawrinka	Todd Perry Thomas Shimada
18.08.	Italy	Manerbio Challenger	$ 050,000	Clay	Olivier Patience	Mariusz Fyrstenberg Marcin Matkowski
	Switzerland	Geneva Challenger	$ 037.500	Clay	Stan Wawrinka	Álex López Morón Andrés Schneiter
	Germany	BMW Challenger Open	$ 025,000	Clay	Daniel Elsner	Irakli Labadze Rogier Wassen
25.08.	Italy	Brindisi Challenger	$ 025,000	Clay	Galo Blanco	Iván Navarro Mario Radić
	Germany	Black Forest Open	$ 025,000	Clay	Gorka Fraile	Franz Stauder Alexander Waske

Date	Country	Tournament	Prizemoney	Surface	Singles champion	Doubles champions
01.09.	Turkey	Istanbul Challenger	$ 075,000	Hard	Robin Söderling	Jonathan Erlich Andy Ram
	Ukraine	Kyiv Challenger	$ 050,000	Clay	Irakli Labadze	Ignacio González King Juan Pablo Guzmán
	Germany	Rhein-Main Challenger	$ 025,000	Clay	Dieter Kindlmann	Karsten Braasch Franz Stauder
	Romania	Brașov Challenger	$ 025,000	Clay	Daniel Elsner	Alexander Peya Rogier Wassen
	Italy	Genova Challenger	$ 025,000	Clay	Óscar Hernández	Daniele Bracciali Vincenzo Santopadre
	Brazil	Gramado Challenger	$ 025,000	Hard	Marcos Daniel	Marcos Daniel Alexandre Simoni
08.09.	Hungary	Budapest Challenger II	$ 025,000	Clay	Marc López	Ignacio González King Juan Pablo Guzmán
	Ukraine	Donetsk Challenger	$ 025,000	Hard	Tomáš Cakl	Harsh Mankad Jason Marshall
	Bulgaria	Sofia Challenger	$ 025,000	Clay	Stéphane Robert	Ilia Kushev Luben Pampoulov
15.09.	France	St. Jean de Luz Challenger	$ 125,000	Hard (i)	Irakli Labadze	Julien Benneteau Nicolas Mahut
	Poland	Szczecin Challenger	$ 125,000	Clay	Nicolás Massú	Mariusz Fyrstenberg Marcin Matkowski
	South Korea	Seoul Challenger	$ 075,000	Hard	Lee Hyung-taik	Alex Kim Lee Hyung-taik
	Bosnia and Herzegovina	Banja Luka Challenger	$ 025,000	Clay	Mario Radić	Ionuț Moldovan Yuri Schukin
	United States	Mandeville Challenger	$ 025,000	Hard	Dmitry Tursunov	Sébastien de Chaunac Zack Fleishman
	Mexico	Mexiko City Challenger	$ 025,000	Hard	Adrián García	Huntley Montgomery Andres Pedroso
	Iran	Tehran Challenger	$ 025,000	Clay	Óscar Hernández	Daniel Köllerer Philipp Müllner
22.09.	France	Grenoble Challenger	$ 075,000	Hard (i)	Richard Gasquet	Paul Baccanello Harel Levy
	United States	San Antonio Challenger	$ 050,000	Hard	Dmitry Tursunov	Paul Goldstein Jeff Morrison
29.09.	United States	Fresno Challenger	$ 050,000	Hard	Alex Kim	Diego Ayala Travis Parrott
	Netherlands	Groningen Challenger	$ 050,000	Hard (i)	Kristof Vliegen	Amir Hadad Harel Levy
	Spain	Seville Challenger	$ 037.500	Clay	Luis Horna	Óscar Hernández Albert Portas
	India	Tumkur Open	$ 025,000	Hard	Philipp Kohlschreiber	Prakash Amritraj Rik de Voest

Date	Country	Tournament	Prizemoney	Surface	Singles champion	Doubles champions
06.10.	Spain	Barcelona Challenger	$ 025,000	Clay	Albert Portas	Juan Ignacio Carrasco Mariano Delfino
	India	Dharwad Challenger	$ 025,000	Hard	Danai Udomchoke	Sanchai Ratiwatana Sonchat Ratiwatana
	Ecuador	Quito Challenger	$ 025,000	Clay	Giovanni Lapentti	Ricardo Mello Alexandre Simoni
13.10.	United States	Tiburon Challenger	$ 037.500	Hard	Alex Bogomolov Jr.	Brandon Coupe Justin Gimelstob
	India	Belgaum Open	$ 025,000	Hard	Yuri Schukin	Michal Mertiňák Branislav Sekáč
	Réunion	La Réunion Challenger	$ 025,000	Hard	Peter Wessels	Federico Browne Rogier Wassen
20.10.	United States	Torrance Challenger	$ 050,000	Hard	Janko Tipsarević	Ramón Delgado André Sá
27.10.	Germany	Lambertz Open by STAWAG	$ 050,000	Carpet (i)	Alexander Peya	Mariusz Fyrstenberg Marcin Matkowski
	United States	Waco Challenger	$ 050,000	Hard	Giovanni Lapentti	Devin Bowen Ashley Fisher
	Great Britain	Nottingham Challenger	$ 025,000	Hard (i)	Joachim Johansson	Amir Hadad Harel Levy

Date	Country	Tournament	Prizemoney	Surface	Singles champion	Doubles champions
03.11.	Slovakia	Bratislava Challenger	$ 100,000	Hard (i)	Marc Rosset	Jonathan Erlich Harel Levy
	Germany	Okal Cup	$ 025,000	Carpet (i)	Dennis van Scheppingen	Stephen Huss Robert Lindstedt
10.11.	Ukraine	Dnipro Challenger	$ 125,000	Hard (i)	Irakli Labadze	Jonathan Erlich Harel Levy
	Finland	Helsinki Challenger II	$ 050,000	Hard (i)	Davide Sanguinetti	Robert Lindstedt Robin Söderling
	United States	Austin Challenger	$ 025,000	Hard	Paul Goldstein	Lu Yen-hsun Jason Marshall
17.11.	France	Champaign Challenger	$ 050,000	Hard (i)	Paul Goldstein	Travis Parrott Bruno Soares
	Czech Republic	Prague Challenger II	$ 025,000	Carpet (i)	Marc Rosset	Martin Štěpánek Igor Zelenay
	Mexico	Puebla Challenger	$ 025,000	Hard	Ricardo Mello	Santiago González Alejandro González
24.11.	Italy	Milan Challenger	$ 050,000	Carpet (i)	Dennis van Scheppingen	Davide Sanguinetti Takao Suzuki

Date	Country	Tournament	Prizemoney	Surface	Singles champion	Doubles champions
01.12.	Austria	Ischgl Challenger	$ 025,000	Carpet (i)	Joachim Johansson	Julian Knowle Alexander Peya
29.12.	New Caledonia	Nouméa Challenger	$ 037.500	Hard	Guillermo Cañas	Ashley Fisher Stephen Huss