The ATP Challenger Tour in 2021 was the secondary professional tennis circuit organized by the ATP. The 2021 ATP Challenger Tour calendar comprised 147 tournaments with prize money ranging from $36,680 up to $156,240. It was the 44th edition of challenger tournaments cycle, and 13th under the name of Challenger Tour.

Tallon Griekspoor set a new record for winning the most Challenger titles in a season when he won his seventh title of the season at the Tenerife Challenger and immediately improved upon the record by winning the Slovak Open II the week after.

Schedule This is the complete schedule of events on the 2021 calendar, with player progression documented from the quarterfinals stage.

January Week ofTournamentChampionsRunners-upSemifinalistsQuarterfinalistsJanuary 18Amex-Istanbul ChallengerIstanbul, Turkey Challenger 125 – Hard (i) – 32S/16Q/16DSingles – Doubles Arthur Rinderknech4–6, 7–6(7–1), 7–6(7–3) Benjamin Bonzi Jozef Kovalík Mohamed Safwat Ergi Kırkın Marc-Andrea Hüsler Antoine Hoang Go Soeda André Göransson David Pel4–6, 6–3, [10–8] Lloyd Glasspool Harri HeliövaaraJanuary 25Open Quimper BretagneQuimper, France Challenger 100 – Hard (i) – 32S/16Q/16DSingles – Doubles Sebastian Korda6–1, 6–1 Filip Horanský Brandon Nakashima Benjamin Bonzi Kacper Żuk Constant Lestienne Illya Marchenko Enzo Couacaud Grégoire Barrère Albano Olivetti5–7, 7–6(9–7), [10–8] James Cerretani Marc-Andrea HüslerAntalya ChallengerAntalya, Turkey Challenger 80 – Clay – 32S/16Q/16DSingles – Doubles Jaume Munar6–7(7–9), 6–2, 6–2 Lorenzo Musetti Tommy Robredo Cem İlkel Alessandro Giannessi Duje Ajduković Tomás Martín Etcheverry Akira Santillan Denys Molchanov Aleksandr Nedovyesov3–6, 6–4, [18–16] Luis David Martínez David Vega Hernández

February Week ofTournamentChampionsRunners-upSemifinalistsQuarterfinalistsFebruary 1Open Quimper Bretagne IIQuimper, France Challenger 80 – Hard (i) – 32S/16Q/16DSingles – Doubles Brandon Nakashima6–3, 6–4 Bernabé Zapata Miralles Lukáš Lacko Peter Gojowczyk Maximilian Marterer Federico Gaio Maxime Janvier Tobias Kamke Ruben Bemelmans Daniel Masur6–2, 6–1 Brandon Nakashima Hunter ReeseAntalya Challenger IIAntalya, Turkey Challenger 80 – Clay – 32S/16Q/16DSingles – Doubles Carlos Taberner6–4, 6–1 Jaume Munar Tomás Martín Etcheverry Alessandro Giannessi Facundo Bagnis Leonardo Mayer Alejandro Tabilo Jozef Kovalík Denys Molchanov Aleksandr Nedovyesov6–4, 7–6(7–2) Robert Galloway Alex LawsonFebruary 8Challenger La MancheCherbourg, France Challenger 100 – Hard (i) – 32S/16Q/16DSingles – Doubles Ruben Bemelmans6–4, 6–4 Lukáš Rosol Arthur Rinderknech Hugo Gaston Michael Geerts Constant Lestienne Lukáš Klein Kacper Żuk Lukáš Klein Alex Molčan1–6, 7–5, [10–6] Antoine Hoang Albano OlivettiPotchefstroom OpenPotchefstroom, South Africa Challenger 80 – Hard – 32S/16Q/16DSingles – Doubles Benjamin Bonzi7–5, 6–4 Liam Broady Cem İlkel Nick Chappell Dimitar Kuzmanov Tseng Chun-hsin Peter Polansky Mirza Bašić Marc-Andrea Hüsler Zdeněk Kolář6–4, 2–6, [10–4] Peter Polansky Brayden SchnurBiella Challenger IndoorBiella, Italy Challenger 80 – Hard (i) – 32S/16Q/16DSingles – Doubles Illya Marchenko6–2, 6–4 Andy Murray Mathias Bourgue Federico Gaio Blaž Rola Matthias Bachinger Lorenzo Giustino Daniel Masur Luis David Martínez David Vega Hernández6–4, 3–6, [10–8] Szymon Walków Jan ZielińskiFebruary 15Biella Challenger Indoor IIBiella, Italy Challenger 125 – Hard (i) – 32S/16Q/16DSingles – Doubles Kwon Soon-woo6–2, 6–3 Lorenzo Musetti Evgeny Donskoy Andreas Seppi Federico Gaio Yannick Maden Illya Marchenko Ernests Gulbis Hugo Nys Tim Pütz7–6(7–4), 6–3 Lloyd Glasspool Harri HeliövaaraChallenger ConcepciónConcepción, Chile Challenger 80 – Clay – 32S/16Q/16DSingles – Doubles Sebastián Báez6–3, 6–7(5–7), 7–6(7–5) Francisco Cerúndolo Alejandro Tabilo Andrej Martin Federico Coria Thiago Seyboth Wild Hugo Dellien Daniel Altmaier Orlando Luz Rafael Matos7–5, 6–4 Sergio Galdós Diego HidalgoPotchefstroom Open IIPotchefstroom, South Africa Challenger 80 – Hard – 32S/16Q/16DSingles – Doubles Jenson Brooksby2–6, 6–3, 6–0 Teymuraz Gabashvili Liam Broady Lucas Miedler Akira Santillan Adrián Menéndez Maceiras Dimitar Kuzmanov Cem İlkel Raven Klaasen Ruan Roelofse6–4, 6–4 Julien Cagnina Zdeněk KolářFebruary 22Nur-Sultan ChallengerNur-Sultan, Kazakhstan Challenger 100 – Hard (i) – 32S/16Q/16DSingles – Doubles Mackenzie McDonald6–1, 6–2 Jurij Rodionov Henri Laaksonen Prajnesh Gunneswaran Frederico Ferreira Silva Kacper Żuk Martin Kližan Tomáš Macháč Denys Molchanov Aleksandr Nedovyesov6–4, 6–4 Nathan Pasha Max SchnurGran Canaria ChallengerLas Palmas, Spain Challenger 80 – Clay – 32S/16Q/16DSingles – Doubles Enzo Couacaud7–6(7–5), 7–6(7–3) Steven Diez Alex Molčan Nikola Milojević Filip Horanský Riccardo Bonadio Andrea Pellegrino Marco Trungelliti Lloyd Glasspool Harri Heliövaara7–5, 6–1 Kimmer Coppejans Sergio Martos Gornés

March Week ofTournamentChampionsRunners-upSemifinalistsQuarterfinalistsMarch 1Nur-Sultan Challenger IINur-Sultan, Kazakhstan Challenger 125 – Hard (i) – 32S/16Q/16DSingles – Doubles Tomáš Macháč4–6, 6–4, 6–4 Sebastian Ofner Prajnesh Gunneswaran Taro Daniel Kwon Soon-woo James Duckworth Frederico Ferreira Silva Wu Tung-lin Nathaniel Lammons Jackson Withrow6–4, 6–2 Nathan Pasha Max SchnurGran Canaria Challenger IILas Palmas, Spain Challenger 80 – Clay – 32S/16Q/16DSingles – Doubles Carlos Gimeno Valero6–4, 6–2 Kimmer Coppejans Eduard Esteve Lobato Blaž Kavčič Marco Trungelliti Giulio Zeppieri Alex Molčan Alessandro Giannessi Enzo Couacaud Manuel Guinard6–1, 6–4 Javier Barranco Cosano Eduard Esteve LobatoSaint Petersburg ChallengerSaint Petersburg, Russia Challenger 50 – Hard (i) – 32S/16Q/16DSingles – Doubles Zizou Bergs6–4, 3–6, 6–4 Altuğ Çelikbilek Artem Dubrivnyy Vít Kopřiva Jesper de Jong Andrey Kuznetsov Lucas Catarina Cem İlkel Christopher Eubanks Roberto Quiroz6–4, 6–3 Jesper de Jong Sem VerbeekMarch 8Biella Challenger Indoor IIIBiella, Italy Challenger 80 – Hard (i) – 32S/16Q/16DSingles – Doubles Andreas Seppi6–2, 6–1 Liam Broady Illya Marchenko Robin Haase Jonáš Forejtek Jurij Rodionov Brayden Schnur Peter Gojowczyk Quentin Halys Tristan Lamasine6–1, 2–0 ret. Denys Molchanov Sergiy StakhovskySaint Petersburg Challenger IISaint Petersburg, Russia Challenger 80 – Hard (i) – 32S/16Q/16DSingles – Doubles Evgenii Tiurnev6–4, 6–2 Kacper Żuk Marius Copil Jiří Lehečka Mirza Bašić Christopher Eubanks Jack Sock Dmitry Popko Jesper de Jong Sem Verbeek6–1, 3–6, [10–5] Konstantin Kravchuk Denis YevseyevMarch 15Biella Challenger Indoor IVBiella, Italy Challenger 80 – Hard (i) – 32S/16Q/16DSingles – Doubles Daniel Masur6–3, 6–7(8–10), 7–5 Matthias Bachinger Illya Marchenko Benjamin Bonzi Grégoire Barrère Sergiy Stakhovsky Sebastian Ofner Mathias Bourgue Lloyd Glasspool Matt Reid6–3, 6–4 Denys Molchanov Sergiy StakhovskyChallenger de SantiagoSantiago, Chile Challenger 80 – Clay – 32S/16Q/16DSingles – Doubles Sebastián Báez6–3, 7–6(7–4) Marcelo Tomás Barrios Vera Felipe Meligeni Alves Juan Pablo Varillas Gonzalo Lama Nicolás Kicker Camilo Ugo Carabelli Nicolás Jarry Luis David Martínez Gonçalo Oliveira7–5, 6–1 Rafael Matos Felipe Meligeni AlvesCleveland OpenCleveland, United States Challenger 80 – Hard (i) – 32S/16Q/16DSingles – Doubles Bjorn Fratangelo7–5, 6–4 Jenson Brooksby Emilio Gómez Aleksandar Kovacevic Michael Redlicki Christopher Eubanks Yosuke Watanuki Alexis Galarneau Robert Galloway Alex Lawson7–5, 6–7(5–7), [11–9] Evan King Hunter ReeseMarch 22Play In ChallengerLille, France Challenger 90 – Hard (i) – 32S/16Q/16DSingles – Doubles Zizou Bergs4–6, 6–1, 7–6(7–5) Grégoire Barrère Maxime Janvier Quentin Halys Jonáš Forejtek Arthur Rinderknech Andrea Arnaboldi Benjamin Bonzi Benjamin Bonzi Antoine Hoang6–3, 6–1 Dan Added Michael GeertsChallenger Città di LuganoLugano, Switzerland Challenger 80 – Hard (i) – 32S/16Q/16DSingles – Doubles Dominic Stricker6–4, 6–2 Vitaliy Sachko Yūichi Sugita Altuğ Çelikbilek Evgeny Karlovskiy Daniel Masur Roman Safiullin Hugo Grenier Andre Begemann Andrea Vavassori7–6(13–11), 4–6, [10–8] Denys Molchanov Sergiy StakhovskyZadar OpenZadar, Croatia Challenger 80 – Clay – 32S/16Q/16DSingles – Doubles Nikola Milojević 2–6, 6–2, 7–6(7–5) Dimitar Kuzmanov Lukáš Klein Nerman Fatić Gianluca Mager Vít Kopřiva Blaž Kavčič Sumit Nagal Blaž Kavčič Blaž Rola2–6, 6–2, [10–3] Lukáš Klein Alex MolčanMarch 29Andalucía ChallengerMarbella, Spain Challenger 80 – Clay – 32S/16Q/16DSingles – Doubles Gianluca Mager2–6, 6–3, 6–2 Jaume Munar Alessandro Giannessi Mario Vilella Martínez Martin Kližan Roberto Marcora Taro Daniel Nikola Milojević Dominic Inglot Matt Reid1–6, 6–3, [10–6] Romain Arneodo Hugo NysOpen de OeirasOeiras, Portugal Challenger 50 – Clay – 32S/16Q/16DSingles – Doubles Zdeněk Kolář6–4, 7–5 Gastão Elias Marco Trungelliti Evan Furness Igor Sijsling Tiago Cação Alex Molčan Raúl Brancaccio Mats Moraing Oscar Otte6–1, 6–4 Riccardo Bonadio Denis Yevseyev

April