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.

Schedule January DateCountryTournamentPrizemoneySurfaceSingles championDoubles champions 30.12.2002 Aberto de São Paulo $ 25,000 Hard Flávio Saretta Federico Browne Rogier Wassen 20.01 Heilbronn Open $ 100,000 Carpet (i) Karol Beck Simon Aspelin Johan Landsberg Hilton Waikoloa Village USTA Challenger $ 37.500 Hard Robby Ginepri Diego Ayala Robert Kendrick 20.01 Challenger of Dallas $ 50,000 Hard (i) Simon Greul Justin Gimelstob Scott Humphries Warsteiner Challenger $ 25,000 Carpet (i) Mario Ančić Aleksandar Kitinov Magnus Larsson

February DateCountryTournamentPrizemoneySurfaceSingles championDoubles champions 03.02. KGHM Polish Indoors $ 150,000 Hard (i) Karol Kučera Petr Luxa David Škoch Joplin Challenger $ 50,000 Hard (i) Bob Bryan Martín García Graydon Oliver Belgrad Challenger $ 25,000 Carpet (i) Dennis van Scheppingen Ilija Bozoljac Nenad Zimonjić 10.02. Warsteiner Challenger Lübeck $ 25,000 Carpet (i) Alexander Waske Ota Fukárek Jordan Kerr 17.02. Challenger 42 $ 100,000 Hard (i) Thierry Ascione David Škoch Lovro Zovko Volkswagen Challenger $ 25,000 Carpet (i) Axel Pretzsch Karsten Braasch Axel Pretzsch 24.02. Challenger Ford de Cherbourg-Octeville $ 50,000 Hard (i) Sergio Roitman Benjamin Cassaigne Rik de Voest Wrexham Challenger $ 25,000 Hard Wesley Moodie Daniele Bracciali Federico Luzzi

March DateCountryTournamentPrizemoneySurfaceSingles championDoubles champions 03.03. Besançon Challenger $ 37.500 Hard (i) Cyril Saulnier Jonathan Erlich Julian Knowle Shimadzu All Japan Indoor Tennis Championships $ 25,000 Carpet (i) Michal Tabara Amir Hadad Andy Ram 10.03. Heineken Challenger $ 50,000 Hard Amir Hadad Rik de Voest Wesley Moodie Abierto Internacional de Salinas $ 25,000 Hard Giovanni Lapentti Martín García Sebastián Prieto Sarajevo Challenger $ 25,000 Hard (i) Richard Gasquet Tomáš Berdych Jaroslav Levinský Hobart Challenger $ 25,000 Hard Satoshi Iwabuchi Federico Browne Rogier Wassen 17.03. Cagliari Challenger $ 25,000 Clay Filippo Volandri Álex López Morón Andrés Schneiter 24.03. Torneo Internazionale di Tennis Città della Disfida Open $ 25,000 Clay Rafael Nadal Sebastián Prieto Sergio Roitman

April DateCountryTournamentPrizemoneySurfaceSingles championDoubles champions 07.04. Calabasas Challenger $ 50,000 Hard Jérôme Golmard Justin Gimelstob Scott Humphries Sanremo Challenger $ 25,000 Clay Tomas Behrend Daniele Bracciali Amir Hadad 14.04. XL Bermuda Open $ 100,000 Clay Flávio Saretta Robert Kendrick Mark Merklein San Luis Potosí Challenger $ 50,000 Clay Dick Norman Alex Bogomolov Jr. Frédéric Niemeyer 21.04. Indian Oil Servo ATP Challenger Bangalore $ 25,000 Hard Grégory Carraz Rodolphe Cadart Grégory Carraz León Challenger $ 25,000 Hard Alex Bogomolov Jr. Ota Fukárek Jordan Kerr Naples Challenger $ 25,000 Clay Richard Gasquet Massimo Bertolini Giorgio Galimberti 28.04. Aix-en-Provence Challenger $ 125,000 Clay Mariano Puerta Stephen Huss Myles Wakefield Indian Oil Servo ATP Challenger New Delhi $ 25,000 Hard Ivo Heuberger Radoslav Lukaev Dmitry Vlasov Rome Challenger $ 25,000 Clay Giorgio Galimberti Amir Hadad Martín Vassallo Argüello

May DateCountryTournamentPrizemoneySurfaceSingles championDoubles champions 05.05. Birmingham Challenger $ 50,000 Clay Óscar Hernández Josh Goffi Travis Parrott 12.05. Forest Hills Challenger $ 50,000 Clay Alex Bogomolov Jr. Justin Gimelstob Scott Humphries Zagreb Open $ 50,000 Clay Kristof Vliegen Lucas Arnold Ker Mariano Hood Fergana Challenger $ 25,000 Hard Tuomas Ketola Justin Bower Aisam-ul-Haq Qureshi Košice Challenger $ 25,000 Clay Martín Vassallo Argüello Stephen Huss Myles Wakefield 19.05. ECM Prague Open $ 100,000 Clay Sjeng Schalken Tomáš Berdych Michal Navrátil Budapest Challenger I $ 25,000 Clay Johan Settergren Ignacio González King Juan Pablo Guzmán 26.05. Ljubljana Challenger $ 25,000 Clay Jiří Vaněk Leonardo Azzaro Gergely Kisgyörgy Turin Challenger $ 25,000 Clay Óscar Serrano Emilio Benfele Álvarez Gabriel Trujillo Soler

June DateCountryTournamentPrizemoneySurfaceSingles championDoubles champions 02.06. Unicredit Czech Open $ 125,000 Clay Radek Štěpánek Jaroslav Levinský David Škoch Schickedanz Open $ 50,000 Clay Jan Frode Andersen Denis Gremelmayr Simon Greul Surbiton Trophy $ 50,000 Grass Wesley Moodie Joshua Eagle Andrew Kratzmann Tallahassee Challenger $ 50,000 Hard Paul Goldstein Not completed Sassuolo Challenger $ 25,000 Clay Mariano Albert-Ferrando Paul Baccanello Stefano Galvani 09.06. Biella Challenger $ 100,000 Clay Filippo Volandri Stefano Galvani Martín Vassallo Argüello ATU Cup $ 50,000 Clay Tomas Behrend Mariano Delfino Patricio Rudi Atlantic City Challenger $ 25,000 Hard Björn Rehnquist Tripp Phillips Ryan Sachire Busan Challenger $ 25,000 Hard Kim Young-jun Toshihide Matsui Michihisa Onoda 16.06. Nord/LB Open $ 125,000 Clay Werner Eschauer Sebastián Prieto Jim Thomas Lugano Challenger $ 50,000 Clay Diego Moyano Joan Balcells Juan Albert Viloca 23.06. Andorra Challenger $ 25,000 Hard (i) Grégory Carraz Rik de Voest Tuomas Ketola Reggio Emilia Challenger $ 25,000 Clay Richard Gasquet Joseph Sirianni Rogier Wassen Pozoblanco Challenger $ 75,000 Hard Stefano Pescosolido Brandon Coupe Noam Okun Mantua Challenger $ 25,000 Clay Vincenzo Santopadre Enzo Artoni Martín Vassallo Argüello Montauban Challenger $ 25,000 Clay Juan Pablo Guzmán Fred Hemmes Rogier Wassen Internationale Badische Meisterschaften um den Techem Cup – Zell $ 25,000 Clay Janko Tipsarević Karsten Braasch Franz Stauder

July DateCountryTournamentPrizemoneySurfaceSingles championDoubles champions 07.07. Granby Challenger $ 50,000 Hard Frank Dancevic Lu Yen-hsun Danai Udomchoke Scheveningen Challenger $ 50,000 Clay Todd Larkham Fred Hemmes Edwin Kempes West of England Challenger $ 25,000 Grass Massimo Dell'Acqua Jean-François Bachelot Nicolas Mahut Oberstaufen Cup $ 25,000 Clay Martín Vassallo Argüello Kornél Bardóczky Gergely Kisgyörgy 14.07. Helsinki Challenger I $ 125,000 Clay (i) Davide Sanguinetti Robert Lindstedt Robin Söderling Aptos Challenger $ 50,000 Hard Jeff Salzenstein Jan Hernych Uros Vico Budaörs Challenger $ 50,000 Clay Tomáš Berdych Leonardo Azzaro Gergely Kisgyörgy Manchester Challenger $ 25,000 Grass Nicolas Mahut Martin Lee Arvind Parmar Olbia Challenger $ 25,000 Clay Nicolás Almagro Alessio di Mauro Vincenzo Santopadre Togliatti Cup $ 25,000 Hard Dudi Sela Jun Kato Alexander Peya 21.07. Campos do Jordão Challenger $ 75,000 Hard Giovanni Lapentti Rik de Voest Giovanni Lapentti Hilversum Challenger $ 75,000 Clay Martin Verkerk Mariusz Fyrstenberg Marcin Matkowski Lexington Challenger $ 50,000 Hard Frank Dancevic Jonathan Erlich Takao Suzuki Tampere Challenger $ 50,000 Clay Robin Söderling Igor Andreev Dmitry Vlasov Valladolid Challenger $ 37.500 Hard Gilles Müller Jun Kato Łukasz Kubot Recanati Challenger $ 25,000 Hard Daniele Bracciali Manuel Jorquera Frank Moser 28.07. Segovia Challenger $ 100,000 Hard Rafael Nadal Ota Fukárek Tripp Phillips Belo Horizonte Challenger $ 25,000 Hard Julio Peralta Marcos Daniel Alexandre Simoni Denver Challenger $ 25,000 Hard Arvind Parmar Rohan Bopanna Aisam-ul-Haq Qureshi St. Petersburg Challenger $ 25,000 Clay Florian Mayer Mikhail Elgin Orest Tereshchuk Trani Challenger $ 25,000 Clay Martín Vassallo Argüello Mariano Delfino Matias O'Neille

August DateCountryTournamentPrizemoneySurfaceSingles championDoubles champions 04.08. San Marino Challenger $ 100,000 Clay Alessio di Mauro Massimo Bertolini Tom Vanhoudt Binghamton Professional Tennis Tournament $ 50,000 Hard Ivo Karlović Jonathan Erlich Andy Ram Mordovia Challenger $ 25,000 Clay Martin Štěpánek Kornél Bardóczky Martin Štěpánek Samarkand Challenger $ 25,000 Clay Daniel Köllerer Viktor Bruthans Sergiy Stakhovsky 11.08. Bronx Challenger $ 50,000 Hard Ivo Karlović Julien Benneteau Nicolas Mahut Bukhara Challenger $ 25,000 Hard Marc-Kevin Goellner Alexey Kedryuk Vadim Kutsenko Graz Challenger $ 25,000 Hard Tomáš Berdych Noam Behr Ota Fukárek Banca Marche Tennis Cup $ 25,000 Clay Stan Wawrinka Todd Perry Thomas Shimada 18.08. Manerbio Challenger $ 50,000 Clay Olivier Patience Mariusz Fyrstenberg Marcin Matkowski Geneva Challenger $ 37.500 Clay Stan Wawrinka Álex López Morón Andrés Schneiter BMW Challenger Open $ 25,000 Clay Daniel Elsner Irakli Labadze Rogier Wassen 25.08. Brindisi Challenger $ 25,000 Clay Galo Blanco Iván Navarro Mario Radić Black Forest Open $ 25,000 Clay Gorka Fraile Franz Stauder Alexander Waske

September DateCountryTournamentPrizemoneySurfaceSingles championDoubles champions 01.09. Istanbul Challenger $ 75,000 Hard Robin Söderling Jonathan Erlich Andy Ram Kyiv Challenger $ 50,000 Clay Irakli Labadze Ignacio González King Juan Pablo Guzmán Rhein-Main Challenger $ 25,000 Clay Dieter Kindlmann Karsten Braasch Franz Stauder Brașov Challenger $ 25,000 Clay Daniel Elsner Alexander Peya Rogier Wassen Genova Challenger $ 25,000 Clay Óscar Hernández Daniele Bracciali Vincenzo Santopadre Gramado Challenger $ 25,000 Hard Marcos Daniel Marcos Daniel Alexandre Simoni 08.09. Budapest Challenger II $ 25,000 Clay Marc López Ignacio González King Juan Pablo Guzmán Donetsk Challenger $ 25,000 Hard Tomáš Cakl Harsh Mankad Jason Marshall Sofia Challenger $ 25,000 Clay Stéphane Robert Ilia Kushev Luben Pampoulov 15.09. St. Jean de Luz Challenger $ 125,000 Hard (i) Irakli Labadze Julien Benneteau Nicolas Mahut Szczecin Challenger $ 125,000 Clay Nicolás Massú Mariusz Fyrstenberg Marcin Matkowski Seoul Challenger $ 75,000 Hard Lee Hyung-taik Alex Kim Lee Hyung-taik Banja Luka Challenger $ 25,000 Clay Mario Radić Ionuț Moldovan Yuri Schukin Mandeville Challenger $ 25,000 Hard Dmitry Tursunov Sébastien de Chaunac Zack Fleishman Mexiko City Challenger $ 25,000 Hard Adrián García Huntley Montgomery Andres Pedroso Tehran Challenger $ 25,000 Clay Óscar Hernández Daniel Köllerer Philipp Müllner 22.09. Grenoble Challenger $ 75,000 Hard (i) Richard Gasquet Paul Baccanello Harel Levy San Antonio Challenger $ 50,000 Hard Dmitry Tursunov Paul Goldstein Jeff Morrison 29.09. Fresno Challenger $ 50,000 Hard Alex Kim Diego Ayala Travis Parrott Groningen Challenger $ 50,000 Hard (i) Kristof Vliegen Amir Hadad Harel Levy Seville Challenger $ 37.500 Clay Luis Horna Óscar Hernández Albert Portas Tumkur Open $ 25,000 Hard Philipp Kohlschreiber Prakash Amritraj Rik de Voest

October DateCountryTournamentPrizemoneySurfaceSingles championDoubles champions 06.10. Barcelona Challenger $ 25,000 Clay Albert Portas Juan Ignacio Carrasco Mariano Delfino Dharwad Challenger $ 25,000 Hard Danai Udomchoke Sanchai Ratiwatana Sonchat Ratiwatana Quito Challenger $ 25,000 Clay Giovanni Lapentti Ricardo Mello Alexandre Simoni 13.10. Tiburon Challenger $ 37.500 Hard Alex Bogomolov Jr. Brandon Coupe Justin Gimelstob Belgaum Open $ 25,000 Hard Yuri Schukin Michal Mertiňák Branislav Sekáč La Réunion Challenger $ 25,000 Hard Peter Wessels Federico Browne Rogier Wassen 20.10. Torrance Challenger $ 50,000 Hard Janko Tipsarević Ramón Delgado André Sá 27.10. Lambertz Open by STAWAG $ 50,000 Carpet (i) Alexander Peya Mariusz Fyrstenberg Marcin Matkowski Waco Challenger $ 50,000 Hard Giovanni Lapentti Devin Bowen Ashley Fisher Nottingham Challenger $ 25,000 Hard (i) Joachim Johansson Amir Hadad Harel Levy

November