The ATP Challenger Series is the second tier tour for professional tennis organised by the Association of Tennis Professionals (ATP). The 2000 ATP Challenger Series calendar comprised 121 tournaments, with prize money ranging from $25,000 up to $125,000.^[1][2]

Date	Country	Tournament	Prizemoney	Surface	Singles champion	Doubles champions
24.01.	Germany	Heilbronn Open Main Draw - Qualifying	$ 100,000	Carpet (i)	Magnus Larsson	Jan Siemerink John van Lottum
	United States	Waikoloa Challenger Main Draw - Qualifying	$ 050,000	Hard	Paul Goldstein	Jim Grabb Richey Reneberg
31.01.	United States	Amarillo Challenger Main Draw - Qualifying	$ 037.500	Hard (i)	Michael Russell	Brian MacPhie Michael Hill
	Germany	Warsteiner Challenger Main Draw - Qualifying	$ 025,000	Carpet (i)	Alexander Popp	Tomáš Cibulec Leoš Friedl

Date	Country	Tournament	Prizemoney	Surface	Singles champion	Doubles champions
07.02.	Germany	Volkswagen Challenger Main Draw - Qualifying	$ 025,000	Carpet (i)	Andrei Stoliarov	Jan-Ralph Brandt Martin Sinner
14.02.	Poland	Wrocław Challenger Main Draw - Qualifying	$ 075,000	Hard (i)	Martin Damm	Petr Kovačka Pavel Kudrnáč
	India	Kolkata Challenger Main Draw - Qualifying	$ 025,000	Grass	Tuomas Ketola	Andy Ram Nir Welgreen
	Great Britain	Hull Challenger Main Draw - Qualifying	$ 025,000	Carpet (i)	Henrik Andersson	Barry Cowan Neville Godwin
	Germany	Warsteiner Challenger Lübeck Main Draw - Qualifying	$ 025,000	Carpet (i)	Christian Vinck	Giorgio Galimberti Diego Nargiso
21.02.	Vietnam	Ho Chi Minh Challenger Main Draw - Qualifying	$ 050,000	Hard	Jiří Vaněk	Michael Hill Todd Woodbridge
	India	Ahmedabad Challenger Main Draw - Qualifying	$ 025,000	Hard	Vadim Kutsenko	Cedric Kauffmann Syed Fazaluddin
28.02.	Singapore	Singapore Challenger Main Draw - Qualifying	$ 050,000	Hard	Todd Woodbridge	Neville Godwin Michael Hill
	France	Cherbourg Challenger Main Draw - Qualifying	$ 037.500	Hard (i)	Julien Boutter	Julien Boutter Michaël Llodra
	India	Mumbai Challenger Main Draw - Qualifying	$ 025,000	Hard	Leander Paes	Tomáš Anzari Satoshi Iwabuchi

Date	Country	Tournament	Prizemoney	Surface	Singles champion	Doubles champions
06.03.	France	Besançon Challenger Main Draw - Qualifying	$ 025,000	Hard (i)	Julien Boutter	Julien Boutter Michaël Llodra
	Japan	Kyoto Challenger Main Draw - Qualifying	$ 025,000	Carpet (i)	Kevin Ullyett	Martin Hromec Tom Spinks
13.03.	Portugal	Lisbon Challenger Main Draw - Qualifying	$ 025,000	Clay	David Sánchez	João Cunha e Silva Nuno Marques
	Germany	Residenza Open Magdeburg Main Draw - Qualifying	$ 025,000	Carpet (i)	Sébastien Lareau	Karsten Braasch Dirk Dier
	Ecuador	Salinas Challenger Main Draw - Qualifying	$ 025,000	Hard	Davide Sanguinetti	Joan Balcells Mauricio Hadad
20.03.	New Zealand	Hamilton Challenger Main Draw - Qualifying	$ 025,000	Hard	Michael Joyce	Neville Godwin Michael Hill
27.03.	Italy	Barletta Challenger	$ 025,000	Clay	Germán Puentes	Petr Kovačka Pavel Kudrnáč

Date	Country	Tournament	Prizemoney	Surface	Singles champion	Doubles champions
03.04.	Italy	Cagliari Challenger	$ 075,000	Clay	Andrea Gaudenzi	Tomáš Cibulec Leoš Friedl
10.04.	Mexico	San Luis Potosí Challenger	$ 050,000	Clay	Agustín Calleri	José de Armas Jimy Szymanski
24.04.	Portugal	Maia Challenger	$ 125,000	Clay	Andrea Gaudenzi	Tomáš Cibulec Leoš Friedl
	Bermuda	XL Bermuda Open	$ 100,000	Clay	Andrew Ilie	Leander Paes Jan Siemerink

Date	Country	Tournament	Prizemoney	Surface	Singles champion	Doubles champions
08.05.	Slovenia	Ljubljana Challenger	$ 100,000	Clay	Oliver Gross	Emilio Benfele Álvarez Álex López Morón
	United States	Birmingham Challenger	$ 050,000	Clay	Ronald Agénor	Paul Kilderry Peter Tramacchi
	Uzbekistan	Fergana Challenger	$ 025,000	Hard	Vladimir Voltchkov	Jonathan Erlich Lior Mor
15.05.	United States	Armonk Challenger	$ 050,000	Clay	Salvador Navarro	Paul Kilderry Peter Tramacchi
	Israel	Jerusalem Challenger	$ 050,000	Hard	Kevin Ullyett	Jeff Coetzee Tuomas Ketola
	Croatia	Zagreb Challenger	$ 050,000	Clay	Gastón Etlis	Michaël Llodra Diego Nargiso
	Great Britain	Edinburgh Challenger	$ 025,000	Clay	Filip Dewulf	Tommy Robredo Michael Russell
	Uzbekistan	Samarkand Challenger	$ 025,000	Clay	Mikhail Youzhny	Stefano Galvani Andrei Stoliarov
22.05.	Hungary	Budapest Challenger I	$ 025,000	Clay	Edwin Kempes	Thomas Shimada Myles Wakefield

Date	Country	Tournament	Prizemoney	Surface	Singles champion	Doubles champions
05.06.	Czech Republic	Prostějov Challenger	$ 100,000	Clay	Andreas Vinciguerra	Alberto Martín Eyal Ran
	Germany	Quelle Cup	$ 050,000	Clay	Irakli Labadze	Eduardo Nicolás Germán Puentes
	Great Britain	Surbiton Challenger	$ 050,000	Grass	Wayne Arthurs	Jeff Coetzee Marcos Ondruska
	United States	Tallahassee Challenger	$ 050,000	Hard	Jeff Salzenstein	Mark Knowles Mark Merklein
12.06.	Poland	Szczecin Challenger	$ 125,000	Clay	Bohdan Ulihrach	Alberto Martín Eyal Ran
	Germany	ATU Cup	$ 075,000	Clay	Daniel Elsner	Mark Nielsen Andrei Stoliarov
	United States	Denver Challenger	$ 050,000	Hard	Lior Mor	Jonathan Erlich Lior Mor
	Portugal	Espinho Challenger	$ 050,000	Clay	Tommy Robredo	Emanuel Couto Bernardo Mota
19.06.	Germany	Nord/LB Open	$ 125,000	Clay	Gastón Gaudio	Jens Knippschild Jeff Tarango
	Switzerland	Lugano Challenger	$ 025,000	Clay	David Sánchez	Vadim Kutsenko Oleg Ogorodov
26.06.	Germany	Wartburg Open	$ 025,000	Clay	Jan Frode Andersen	Daniel Melo Alexandre Simoni
	Italy	Sassuolo Challenger	$ 025,000	Clay	Stefano Tarallo	Álex Calatrava Salvador Navarro

Date	Country	Tournament	Prizemoney	Surface	Singles champion	Doubles champions
03.07.	Italy	Venice Challenger	$ 100,000	Clay	Agustín Calleri	Julián Alonso Aleksandar Kitinov
	Germany	Müller Cup	$ 050,000	Clay	Germán Puentes	Orlin Stanoytchev Mikhail Youzhny
	France	Montauban Challenger	$ 025,000	Clay	Jean-René Lisnard	Lee Pearson Grant Silcock
10.07.	Belgium	Ostend Challenger	$ 075,000	Clay	Olivier Rochus	Tim Crichton Ashley Fisher
	Netherlands	Scheveningen Challenger	$ 075,000	Clay	Nicolas Coutelot	Paul Hanley Nathan Healey
	Great Britain	Bristol Challenger	$ 050,000	Grass	Andy Ram	Jordan Kerr Damien Roberts
	Canada	Granby Challenger	$ 050,000	Hard	Takao Suzuki	Lee Hyung-taik Yoon Yong-il
	Germany	Oberstaufen Cup	$ 025,000	Clay	Clemens Trimmel	Hugo Armando Alexandre Simoni
17.07.	United States	Aptos Challenger	$ 050,000	Hard	Bob Bryan	Bob Bryan Mike Bryan
	Great Britain	Manchester Challenger	$ 050,000	Grass	Mosé Navarra	Dejan Petrović Andy Ram
	France	Contrexéville Challenger	$ 037.500	Clay	Vincenzo Santopadre	Julien Benneteau Nicolas Mahut
24.07.	Turkey	Istanbul Challenger	$ 075,000	Hard	Wayne Black	Noam Behr Eyal Erlich
	Spain	Córdoba Challenger	$ 050,000	Hard	Réginald Willems	Dejan Petrović Andy Ram
	Finland	Tampere Challenger	$ 050,000	Clay	Johan Van Herck	Ville Liukko Jarkko Nieminen
	United States	Winnetka Challenger	$ 050,000	Hard	Takao Suzuki	Lee Hyung-taik Yoon Yong-il
31.07.	Poland	Poznań Challenger	$ 100,000	Clay	Christophe Rochus	Petr Pála Pavel Vízner
	Spain	Open Castilla y León	$ 100,000	Hard	Sergi Bruguera	Ashley Fisher Jason Weir-Smith
	United States	Lexington Challenger	$ 050,000	Hard	Takao Suzuki	Lorenzo Manta Laurence Tieleman
	Brazil	Gramado Challenger	$ 025,000	Hard	Alexandre Simoni	André Sá Eric Taino
	Great Britain	Wrexham Challenger	$ 025,000	Hard	Wayne Arthurs	Daniele Bracciali Aisam-ul-Haq Qureshi

Date	Country	Tournament	Prizemoney	Surface	Singles champion	Doubles champions
07.08.	United States	Binghamton Challenger	$ 050,000	Hard	Takao Suzuki	Justin Bower Jeff Coetzee
	Czech Republic	Prague Challenger I	$ 050,000	Clay	Albert Montañés	František Čermák Ota Fukárek
	Poland	Sopot Challenger	$ 050,000	Clay	Hugo Armando	Sergio Roitman Andrés Schneiter
	Brazil	Belo Horizonte Challenger	$ 025,000	Hard	Nenad Zimonjić	Daniel Melo Alexandre Simoni
	Russia	Togliatti Challenger	$ 025,000	Hard	Vadim Kutsenko	Dušan Vemić Lovro Zovko
14.08.	Ukraine	Kyiv Challenger	$ 100,000	Clay	Jacobo Díaz	Cristian Kordasz Gábor Köves
	United States	Bronx Challenger	$ 050,000	Hard	Lee Hyung-taik	Petr Luxa Wesley Whitehouse
	Italy	Bressanone Challenger	$ 025,000	Clay	František Čermák	Jordan Kerr Damien Roberts
	Germany	Volvo Sylt Open	$ 025,000	Clay	Yuri Schukin	Ionuț Moldovan Yuri Schukin
21.08.	Switzerland	Geneva Challenger	$ 050,000	Clay	Nicolas Thomann	Diego del Río Edgardo Massa
	Italy	Manerbio Challenger	$ 025,000	Clay	Stefano Tarallo	Jordan Kerr Damien Roberts
	Germany	BMW Challenger Open	$ 025,000	Clay	Nikolay Davydenko	Emilio Benfele Álvarez Luis Horna
28.08.	Germany	Black Forest Open	$ 037.500	Clay	Michal Tabara	Ionuț Moldovan Yuri Schukin
	Hungary	Budapest Challenger II	$ 025,000	Clay	Diego Moyano	Sergio Roitman Andrés Schneiter

Date	Country	Tournament	Prizemoney	Surface	Singles champion	Doubles champions
04.09.	Austria	Graz Challenger	$ 100,000	Clay	Michal Tabara	Tomáš Cibulec Leoš Friedl
	Germany	Rhein-Main Challenger	$ 037.500	Clay	Nicolas Coutelot	Petr Luxa David Škoch
	Bulgaria	Sofia Challenger	$ 025,000	Clay	Stefano Tarallo	Dejan Petrović Orlin Stanoytchev
11.09.	Austria	Linz Challenger	$ 075,000	Clay	Germán Puentes	Julian Knowle Thomas Strengberger
	North Macedonia	Skopje Challenger	$ 025,000	Clay	Oliver Gross	Enzo Artoni Sergio Roitman
18.09.	Italy	Biella Challenger	$ 100,000	Clay	Filippo Volandri	Martín García Mariano Puerta
	United States	Houston Challenger	$ 050,000	Hard	James Blake	Brent Haygarth Marcos Ondruska
	Romania	Brașov Challenger	$ 025,000	Clay	Alexandre Simoni	Ionuț Moldovan Yuri Schukin
25.09.	United States	San Antonio Challenger	$ 050,000	Hard	Xavier Malisse	Wesley Whitehouse Gareth Williams
	Spain	Copa Sevilla	$ 037.500	Clay	Tommy Robredo	Eduardo Nicolás Germán Puentes

Date	Country	Tournament	Prizemoney	Surface	Singles champion	Doubles champions
02.10.	Spain	Barcelona Challenger	$ 100,000	Clay	Albert Portas	Tomás Carbonell Albert Portas
	Slovakia	Slovak Open	$ 100,000	Hard	Davide Sanguinetti	Paul Hanley Paul Rosner
	United States	Austin Challenger	$ 050,000	Hard	Andy Roddick	Tim Crichton Ashley Fisher
	Morocco	Tangier Challenger	$ 025,000	Clay	Werner Eschauer	Ionuț Moldovan Yuri Schukin
09.10.	Egypt	Cairo Challenger	$ 100,000	Clay	Albert Portas	Albert Portas Álex López Morón
	Mexico	Guadalajara Challenger	$ 100,000	Clay	Fernando Meligeni	Hugo Armando Alexander Waske
	France	Grenoble Challenger	$ 075,000	Hard (i)	Antony Dupuis	Julian Knowle Lorenzo Manta
	United States	Tulsa Challenger	$ 050,000	Hard	Jimy Szymanski	Enrique Abaroa Michael Sell
	Uzbekistan	Bukhara Challenger	$ 025,000	Hard	Noam Behr	Vadim Kutsenko Oleg Ogorodov
16.10.	Ecuador	Lima Challenger	$ 100,000	Clay	Guillermo Coria	Gastón Etlis Martín Rodríguez
	Germany	Okal Cup	$ 025,000	Carpet (i)	Jens Knippschild	Karsten Braasch Jens Knippschild
23.10.	Brazil	São Paulo Challenger	$ 100,000	Clay	Guillermo Coria	Mariano Hood Sebastián Prieto
30.10.	Belgium	Charleroi Challenger	$ 100,000	Carpet (i)	Jan Siemerink	Petr Pála Pavel Vízner
	United States	Las Vegas Challenger	$ 050,000	Hard	Neville Godwin	Jeff Coetzee Marcos Ondruska
	Ecuador	Quito Challenger	$ 025,000	Clay	Hugo Armando	Francisco Costa Irakli Labadze
	Japan	Yokohama Challenger	$ 025,000	Carpet (i)	Eric Taino	Yves Allegro Julian Knowle

Date	Country	Tournament	Prizemoney	Surface	Singles champion	Doubles champions
06.11.	Chile	Santiago Challenger	$ 100,000	Clay	Diego Moyano	Irakli Labadze Dušan Vemić
	United States	Burbank Challenger	$ 050,000	Hard	Andy Roddick	Mark Merklein Mitch Sprengelmeyer
	South Korea	Seoul Challenger	$ 050,000	Hard	Lee Hyung-taik	Tim Crichton Ashley Fisher
13.11.	Uruguay	Montevideo Challenger	$ 100,000	Clay	Guillermo Coria	Lucas Arnold Ker Gastón Etlis
	Germany	Lambertz Open by STAWAG	$ 050,000	Carpet (i)	Rainer Schüttler	Sander Groen Jan Siemerink
	Japan	Osaka Challenger	$ 025,000	Hard	Michel Kratochvil	František Čermák Ota Fukárek
	United States	Rancho Mirage Challenger	$ 025,000	Hard	James Blake	Mark Merklein Mitch Sprengelmeyer
20.11.	France	Brest Challenger	$ 100,000	Hard (i)	Michel Kratochvil	Tuomas Ketola Laurence Tieleman
	Argentina	Buenos Aires Challenger	$ 100,000	Clay	Guillermo Coria	Pablo Albano Lucas Arnold Ker
	United States	Knoxville Challenger	$ 050,000	Hard (i)	Cristiano Caratti	Karsten Braasch Michael Kohlmann
	Mexico	Puebla Challenger	$ 025,000	Hard	Brandon Hawk	Zack Fleishman Jeff Williams
27.11.	United States	Urbana Challenger	$ 050,000	Hard (i)	Jeff Salzenstein	Taylor Dent Mardy Fish

Date	Country	Tournament	Prizemoney	Surface	Singles champion	Doubles champions
04.12.	Costa Rica	Costa Rica Challenger	$ 100,000	Hard	Antony Dupuis	Guillermo Cañas Adrián García
	Italy	Milan Challenger	$ 050,000	Carpet (i)	Mosé Navarra	George Bastl Giorgio Galimberti
	Czech Republic	Prague Challenger II	$ 025,000	Hard (i)	Jan Vacek	Kristian Pless Aisam-ul-Haq Qureshi