The ATP Challenger Series is the second tier tour for professional tennis organised by the Association of Tennis Professionals (ATP). The 2001 ATP Challenger Series calendar comprised 135 tournaments, with prize money ranging from $25,000 up to $125,000.^[1][2]

Schedule

January

Date	Country	Tournament	Prizemoney	Surface	Singles champion	Doubles champions
01.01.	Brazil	Aberto de São Paulo	$ 025,000	Hard	Flávio Saretta	Noam Okun André Sá
22.01.	Germany	Heilbronn Open	$ 100,000	Carpet (i)	Michaël Llodra	Sander Groen Jack Waite
	United States	Hilton Waikoloa Village USTA Challenger	$ 050,000	Hard	Andy Roddick	Paul Goldstein Jim Thomas
29.01.	Germany	Warsteiner Challenger	$ 025,000	Carpet (i)	Michaël Llodra	Julian Knowle Lorenzo Manta

February

Date	Country	Tournament	Prizemoney	Surface	Singles champion	Doubles champions
05.02.	Poland	KGHM Polish Indoors	$ 125,000	Hard (i)	Axel Pretzsch	Wayne Black Jason Weir-Smith
	United States	Challenger of Dallas	$ 050,000	Hard	Dmitry Tursunov	Gavin Sontag Jerry Turek
12.02.	Germany	Warsteiner Challenger Lübeck	$ 025,000	Carpet (i)	Zbynek Mlynarik	Julian Knowle Lorenzo Manta
	India	Mumbai Challenger	$ 025,000	Hard	Federico Luzzi	František Čermák Ota Fukárek
19.02.	France	Challenger 42	$ 050,000	Hard (i)	Nenad Zimonjić	Julien Benneteau Nicolas Mahut
	Vietnam	Heineken Challenger	$ 050,000	Hard	Petr Kralert	Takao Suzuki Eric Taino
	India	The IndianOil Servo ATP Challenger	$ 025,000	Hard	Dennis van Scheppingen	František Čermák Radek Štěpánek
	Great Britain	Hull Challenger	$ 025,000	Carpet (i)	Michael Kohlmann	Michael Kohlmann Michaël Llodra
	Germany	Volkswagen Challenger	$ 025,000	Carpet (i)	Jarkko Nieminen	Robert Lindstedt Fredrik Lovén
26.02.	Singapore	Singapore Challenger	$ 050,000	Hard	Ota Fukárek	Tim Crichton Ashley Fisher
	France	Challenger Ford de Cherbourg-Octeville	$ 037.500	Hard (i)	Orlin Stanoytchev	Julian Knowle Lorenzo Manta

March

Date	Country	Tournament	Prizemoney	Surface	Singles champion	Doubles champions
05.03.	Japan	Shimadzu All Japan Indoor Tennis Championships	$ 025,000	Carpet (i)	John van Lottum	Noam Behr Noam Okun
12.03.	Germany	Residenza Open Magdeburg	$ 025,000	Carpet (i)	Axel Pretzsch	Frédéric Niemeyer Radek Štěpánek
	Australia	Perth Challenger	$ 025,000	Hard	Vasilis Mazarakis	Stephen Huss Lee Pearson
	Ecuador	Abierto Internacional de Salinas	$ 025,000	Hard	David Nalbandian	Luis Horna David Nalbandian
19.03.	Portugal	Espinho Open	$ 025,000	Clay	Félix Mantilla	Wim Neefs Djalmar Sistermans
	New Zealand	Hamilton Challenger	$ 025,000	Hard	Björn Rehnquist	Noam Behr Noam Okun
26.03.	Italy	Torneo Internazionale di Tennis Città della Disfida Open	$ 025,000	Clay	Félix Mantilla	Germán Puentes Jairo Velasco Jr.

April

Date	Country	Tournament	Prizemoney	Surface	Singles champion	Doubles champions
02.04.	United States	USTA Challenger of Calabasas	$ 025,000	Hard	André Sá	Ota Fukárek Ivo Heuberger
09.04.	Mexico	San Luis Potosí Challenger	$ 050,000	Clay	Martín Rodríguez	Edgardo Massa Sergio Roitman
16.04.	Bermuda	XL Bermuda Open	$ 100,000	Clay	José Acasuso	Paul Goldstein Andy Roddick

May

Date	Country	Tournament	Prizemoney	Surface	Singles champion	Doubles champions
07.05.	United States	Birmingham Challenger	$ 050,000	Clay	Irakli Labadze	James Blake Mark Merklein
	Israel	Jerusalem Challenger	$ 050,000	Hard	Noam Okun	Jonathan Erlich Michaël Llodra
	Uzbekistan	Fergana Challenger	$ 025,000	Hard	Ivo Heuberger	Rik de Voest Igor Kunitsyn
14.05.	United States	Belmont Farms USTA Challenger	$ 050,000	Clay	Jan Vacek	Mark Merklein Mitch Sprengelmeyer
	Croatia	Zagreb Open	$ 050,000	Clay	Jacobo Díaz	Enzo Artoni Andrés Schneiter
	Belgium	Antwerp Challenger	$ 025,000	Clay	Dick Norman	Juan Giner Jerry Turek
	Great Britain	Edinburgh Challenger	$ 025,000	Clay	Kristian Pless	Filippo Messori Salvador Navarro
	Czech Republic	ECM Prague Open	$ 025,000	Clay	Ctislav Doseděl	Jaroslav Levinský Michal Navrátil
21.05.	Hungary	Budapest Challenger I	$ 025,000	Clay	Giorgio Galimberti	Daniel Melo Sergio Roitman
28.05.	Romania	Compaq Challenger	$ 025,000	Clay	Irakli Labadze	Mark Merklein Paul Rosner
	Brazil	Aberto da Costa do Sauípe	$ 025,000	Hard	André Sá	Adriano Ferreira Daniel Melo

June

Date	Country	Tournament	Prizemoney	Surface	Singles champion	Doubles champions
04.06.	Czech Republic	Unicredit Czech Open	$ 100,000	Clay	Bohdan Ulihrach	Andrea Gaudenzi Sander Groen
	Germany	Quelle Cup	$ 050,000	Clay	Germán Puentes	Hugo Armando Andrei Stoliarov
	Great Britain	Surbiton Trophy	$ 050,000	Grass	Taylor Dent	David Adams Ben Ellwood
	United States	Tallahassee Tennis Challenger	$ 050,000	Hard	Ramón Delgado	Matthew Breen Lee Pearson
11.06.	Italy	Top Wool Challenger	$ 100,000	Clay	Adrian Voinea	Enzo Artoni Andrés Schneiter
	Germany	ATU Cup	$ 050,000	Clay	Jiří Vaněk	Julián Alonso Hugo Armando
18.06.	Germany	Nord/LB Open	$ 125,000	Clay	Andrea Gaudenzi	Karsten Braasch Jens Knippschild
	Switzerland	Challenger Lugano	$ 050,000	Clay	Jiří Vaněk	Steven Randjelovic Attila Sávolt
25.06.	Andorra	Open Internacional d’Andorra	$ 025,000	Hard (i)	Noam Okun	Denis Golovanov Tuomas Ketola
	Germany	Wartburg Open	$ 025,000	Clay	Oliver Gross	Yves Allegro Gabriel Trifu
	Italy	Memorial Savigni	$ 025,000	Clay	Attila Sávolt	Didac Pérez Gabriel Trujillo Soler

July

Date	Country	Tournament	Prizemoney	Surface	Singles champion	Doubles champions
02.07.	Italy	Venice Challenger	$ 100,000	Clay	Christophe Rochus	Mark Merklein Mitch Sprengelmeyer
	Germany	Müller Cup	$ 050,000	Clay	Nikolay Davydenko	František Čermák David Škoch
	Brazil	Intelig Tennis Cup	$ 025,000	Hard	Ricardo Mello	Alejandro Hernández André Sá
	France	Open de Montauban	$ 025,000	Clay	Oliver Gross	Diego del Río Vadim Kutsenko
09.07.	Netherlands	Samsung Open	$ 075,000	Clay	Raemon Sluiter	Jordan Kerr Grant Silcock
	Great Britain	Bristol Challenger Trophy	$ 050,000	Grass	Jamie Delgado	Wesley Moodie Shaun Rudman
	Canada	Granby Challenger	$ 050,000	Hard	Axel Pretzsch	Bobby Kokavec Jeff Morrison
	Brazil	Tess Tennis Classic	$ 025,000	Clay	Alessio di Mauro	Edgardo Massa Leonardo Olguín
	Italy	Challenger Canottieri Mincio	$ 025,000	Clay	Diego Hipperdinger	Stefano Galvani Salvador Navarro
	Germany	Oberstaufen Cup	$ 025,000	Clay	Oliver Gross	Karol Beck Branislav Sekáč
16.07.	United States	USTA Seascape Challenger	$ 050,000	Hard	Jeff Salzenstein	Brandon Hawk Robert Kendrick
	Great Britain	Manchester Trophy	$ 050,000	Grass	Jean-François Bachelot	Ben Ellwood Fredrik Lovén
23.07.	Brazil	Credicard Mastercard Tennis Cup	$ 075,000	Hard	Ramón Delgado	Dejan Petrović Andy Ram
	Finland	Amer-Wilson Tampere ATP Tournament	$ 050,000	Clay	Jarkko Nieminen	Stephen Huss Lee Pearson
	Hungary	Stella Artois Clay Court Championships	$ 025,000	Clay	Juan Ignacio Chela	Petr Dezort Radomír Vašek
30.07.	San Marino	San Marino CEPU Open	$ 100,000	Clay	Juan Antonio Marín	František Čermák David Škoch
	Spain	Open Castilla y León	$ 100,000	Hard	Juan Ignacio Chela	Wesley Moodie Shaun Rudman
	United States	Fifth Third Bank Tennis Classic	$ 050,000	Hard	Paul Goldstein	John-Laffnie de Jager Robbie Koenig
	Brazil	BH Tennis Open International Cup	$ 025,000	Hard	Eric Taino	Dejan Petrović Andy Ram
	Great Britain	Wrexham Challenger	$ 025,000	Hard	Michael Kohlmann	Gilles Elseneer Alexander Popp

August

Date	Country	Tournament	Prizemoney	Surface	Singles champion	Doubles champions
06.08.	Spain	Open Diputación Ciudad de Pozoblanco	$ 075,000	Hard	Jarkko Nieminen	Jordan Kerr Grant Silcock
	United States	Time Warner USTA Challenger	$ 050,000	Hard	Cedric Kauffmann	Bobby Kokavec Frédéric Niemeyer
	Austria	Skandia Open	$ 050,000	Clay	Jan Vacek	Aleksandar Kitinov Todd Perry
	Brazil	Gramado Open de Tênis	$ 025,000	Hard	Barry Cowan	Dejan Petrović Andy Ram
	Italy	ATP Challenger Riviera delle Palme	$ 025,000	Clay	Marzio Martelli	Leonardo Azzaro Stefano Galvani
	Russia	Togliatti Cup	$ 025,000	Hard	Alexander Peya	Karol Beck Igor Zelenay
13.08.	United States	Bronx Challenger	$ 050,000	Hard	Björn Phau	Kelly Gullett Bobby Kokavec
	Austria	CA Challenge	$ 050,000	Hard	Julian Knowle	Tim Crichton Todd Perry
	Poland	Sopot Challenger	$ 050,000	Clay	David Ferrer	Bartłomiej Dąbrowski Marcin Matkowski
	Brazil	Brasília Challenger I	$ 025,000	Clay	Gastón Etlis	Gastón Etlis Leonardo Olguín
	Italy	Bressanone Challenger	$ 025,000	Clay	Renzo Furlan	Massimo Bertolini Cristian Brandi
	Germany	Volvo Sylt Open	$ 025,000	Clay	Salvador Navarro	Dennis van Scheppingen Bobbie Altelaar
20.08.	Switzerland	Geneva Challenger	$ 050,000	Clay	Dennis van Scheppingen	Diego del Río Orlin Stanoytchev
	Brazil	Ribeirão Challenger	$ 050,000	Clay	Juan Ignacio Chela	Adriano Ferreira Antonio Prieto
	Italy	Manerbio Challenger	$ 025,000	Clay	Attila Sávolt	Attila Sávolt Thomas Strengberger
	Germany	BMW Challenger Open	$ 025,000	Clay	Jürgen Melzer	Jens Knippschild Jairo Velasco Jr.
27.08.	Brazil	Telesp Celular Open	$ 050,000	Clay	Juan Ignacio Chela	Edgardo Massa Flávio Saretta
	Germany	Black Forest Open	$ 037.500	Clay	Albert Montañés	Franz Stauder Alexander Waske
	Italy	Brindisi Challenger	$ 025,000	Clay	Federico Luzzi	Daniele Bracciali Giorgio Galimberti

September

Date	Country	Tournament	Prizemoney	Surface	Singles champion	Doubles champions
03.09.	Ukraine	Kiew Challenger	$ 125,000	Clay	David Sánchez	Jordan Kerr Grant Silcock
	Brazil	Curitiba Challenger	$ 050,000	Clay	Flávio Saretta	Tim Crichton Ashley Fisher
	Germany	Rhein-Main Challenger	$ 037.500	Clay	Simon Greul	Aleksandar Kitinov Dušan Vemić
	Romania	Brașov Challenger	$ 025,000	Clay	Stefano Galvani	Amir Hadad Lovro Zovko
10.09.	United States	Tarzana Challenger	$ 050,000	Hard	Levar Harper-Griffith	Zack Fleishman Michael Joyce
	Hungary	Budapest Challenger II	$ 025,000	Clay	Didac Pérez	Oliver Marach Jarkko Nieminen
	Bulgaria	Sofia Challenger	$ 025,000	Clay	Vasilis Mazarakis	Igor Gaudi Stefano Galvani
	Poland	Compaq Cup	$ 025,000	Clay	Ota Fukárek	Julian Knowle Michael Kohlmann
17.09.	Poland	Stettin Challenger	$ 125,000	Clay	Juan Ignacio Chela	Mariusz Fyrstenberg Marcin Matkowski
	Turkey	TED Open	$ 075,000	Hard	Nikolay Davydenko	Jonathan Erlich Michaël Llodra
	Brazil	Florianópolis Challenger	$ 050,000	Clay	Edgardo Massa	Gastón Etlis Martín Rodríguez
	Spain	Copa Sevilla	$ 037.500	Clay	Stefano Galvani	Stefano Galvani Vincenzo Santopadre
24.09.	Portugal	Maia Open	$ 125,000	Clay	Jarkko Nieminen	Juan Ignacio Carrasco Djalmar Sistermans
	Slovenia	Kamnik Challenger	$ 025,000	Clay	Željko Krajan	Igor Brukner Jaroslav Levinský
	Uzbekistan	Samarkand Challenger	$ 025,000	Clay	Oleg Ogorodov	Denis Golovanov Vadim Kutsenko
	Brazil	São Paulo Challenger I	$ 025,000	Clay	Edgardo Massa	Adriano Ferreira Edgardo Massa

October

Date	Country	Tournament	Prizemoney	Surface	Singles champion	Doubles champions
01.10.	Italy	Cagliari Challenger	$ 075,000	Clay	Fernando Vicente	Juan Ignacio Carrasco Álex López Morón
	France	Grenoble Challenger	$ 075,000	Hard (i)	Johan Settergren	Jonathan Erlich Andy Ram
	Mexico	Guadalajara Challenger	$ 075,000	Clay	Agustín Calleri	Gastón Etlis Martin Rodriguez
	United States	Tulsa Challenger	$ 050,000	Hard	Jan Hernych	Mardy Fish Jeff Morrison
	Uzbekistan	Bukhara Challenger	$ 025,000	Hard	John van Lottum	Aisam-ul-Haq Qureshi Rogier Wassen
08.10.	Peru	Lima Challenger	$ 075,000	Clay	Juan Ignacio Chela	Enzo Artoni Daniel Melo
	Spain	Barcelona Challenger	$ 050,000	Clay	Konstantinos Economidis	Juan Ignacio Carrasco Álex López Morón
	United States	Kerrville Challenger	$ 025,000	Hard	Alex Kim	Brandon Hawk Robert Kendrick
15.10.	Finland	Helsinki Challenger	$ 050,000	Carpet (i)	George Bastl	Tim Crichton Jim Thomas
	Brazil	Brasília Challenger II	$ 025,000	Clay	Sebastián Prieto	Luis Lobo Daniel Orsanic
	Ecuador	Quito Challenger	$ 025,000	Clay	Hugo Armando	Ricardo Schlachter Rogier Wassen
22.10.	Brazil	São Paulo Challenger II	$ 075,000	Clay	Agustín Calleri	Agustín Calleri Edgardo Massa
	South Korea	Seoul Challenger	$ 050,000	Hard	Lee Hyung-taik	František Čermák Jaroslav Levinský
	United States	Houston Challenger	$ 025,000	Hard	Vince Spadea	Jeff Coetzee Paul Rosner
29.10.	Chile	Santiago Challenger	$ 075,000	Clay	Marcelo Ríos	André Sá Alexandre Simoni
	Germany	Lambertz Open by STAWAG	$ 050,000	Carpet (i)	Alexander Popp	Julian Knowle Michael Kohlmann
	Great Britain	Bolton Challenger	$ 025,000	Hard (i)	Olivier Rochus	Gilles Elseneer Wim Neefs
	United States	Burbank Challenger	$ 025,000	Hard	Kevin Kim	Scott Humphries Chris Woodruff
	Japan	Yokohama Challenger	$ 025,000	Carpet (i)	Takao Suzuki	Takao Suzuki Mitsuru Takada

November

Date	Country	Tournament	Prizemoney	Surface	Singles champion	Doubles champions
05.11.	Slovakia	Bratislava Challenger	$ 100,000	Clay (i)	Karol Kučera	Petr Luxa Radek Štěpánek
	Uruguay	Montevideo Challenger	$ 075,000	Clay	David Nalbandian	Diego del Río Martín Vassallo Argüello
	United States	UT Tyler Patriot Challenger	$ 050,000	Hard	Noam Okun	Stephen Huss Paul Rosner
	Germany	Okal Cup	$ 025,000	Carpet (i)	Alexander Popp	George Bastl Neville Godwin
12.11.	Argentina	Buenos Aires Challenger	$ 075,000	Clay	Agustín Calleri	Federico Browne Ignacio Hirigoyen
	United States	Knoxville Challenger	$ 050,000	Hard (i)	James Blake	Mardy Fish Jeff Morrison
19.11.	Venezuela	Caracas Challenger	$ 025,000	Hard	Julian Knowle	Julian Knowle Michael Kohlmann
	Czech Republic	Prague Challenger	$ 025,000	Hard (i)	Ota Fukárek	Lukáš Dlouhý David Miketa
	Mexico	Puebla Challenger	$ 025,000	Hard	Miguel Gallardo Valles	Jonathan Erlich Andy Ram
26.11.	Costa Rica	Copa Ericsson Costa Rica	$ 075,000	Hard	Michael Kohlmann	Jonathan Erlich Andy Ram
	Italy	Mailand Challenger	$ 050,000	Carpet (i)	Marc Rosset	Nicola Bruno Gianluca Pozzi
	United States	Urbana Challenger	$ 050,000	Hard (i)	Ivo Karlović	Mardy Fish Jeff Morrison

December

Date	Country	Tournament	Prizemoney	Surface	Singles champion	Doubles champions
03.12.	Brazil	Rio de Janeiro Challenger	$ 025,000	Clay	Kristian Pless	Justin Gimelstob David Macpherson
	Thailand	Bangkok Challenger	$ 025,000	Hard	Paradorn Srichaphan	Jaroslav Levinský Aisam-ul-Haq Qureshi