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On the ATP and Challenger tours, tournament strength varies wildly, even among events with similar prize money and ranking points. This report allows you to compare field quality across tournaments, using a technique suggested by Carl Bialik.

The fields such as "wp(50)" refer to the chance that the 50th-ranked player in would have won the event, while "pts(50)" shows the 50th-ranked player's "expected points," which takes into account the ATP ranking points awarded to winners.

For more on the methodology, here is the article in which I introduced this approach. Click the column headers to sort, and shift-click to sort by multiple columns.

Updated weekly. Last update: 2013-03-04

DateEventPtsDrawSurfaceRkTop SeedRkChampwp(50)epts(50)wp(100)epts(100)wp(200)epts(200)
2013-03-11Dallas Challenger12532Hard35Marcos Baghdatis1001TBD10.6%382.0%130.4%7
2013-02-25Cherbourg CH9032Hard63Gilles Muller346Jesse Huta Galung15.8%287.7%201.8%11
2013-02-25Salinas CH8032Clay110Thiemo De Bakker213Alejandro Gonzalez14.9%237.5%154.1%11
2013-02-25Sydney1 CH8032Hard137Yuichi Sugita559Nick Kyrgios27.3%3415.9%255.0%14
2013-02-11Quimper CH9032Hard80Roberto Bautista Agut160Marius Copil11.8%234.9%151.1%7
2013-02-04Bergamo CH9032Hard136Ernests Gulbis208Michal Przysiezny14.9%287.1%191.6%9
2013-02-04Dallas CH10032Hard104Jesse Levine191Rhyne Williams12.2%265.3%171.2%8
2013-02-04West Lakes CH8032Hard117Yuichi Sugita429Matthew Barton24.5%3213.8%234.1%12
2013-01-28Burnie CH8032Hard181Peter Polansky183John Millman25.2%3214.6%235.1%14
2013-01-22Bucaramanga CH8032Clay64Santiago Giraldo142Federico Delbonis13.4%215.9%132.8%9
2013-01-21Heilbronn CH11032Hard60Paul Henri Mathieu135Michael Berrer8.9%233.4%140.7%7
2013-01-21Maui CH8032Hard73Go Soeda73Go Soeda15.8%256.4%142.1%9
2012-12-31Noumea CH10032Hard93Steve Darcis192Adrian Mannarino19.7%349.2%232.6%11
2012-12-31Sao Paulo CH12532Hard85Horacio Zeballos85Horacio Zeballos34.6%6121.7%468.4%27
2012-11-19Toyota CH8032Carpet119Yuichi Sugita266Michal Przysiezny25.7%3314.2%243.9%12
2012-11-19Tyumen CH8032Hard96Evgeny Donskoy96Evgeny Donskoy28.5%3716.9%284.4%13
2012-11-12Champaign CH8032Hard85Michael Russell152Tim Smyczek18.6%289.2%192.7%11
2012-11-12Helsinki CH12532Hard46Jarkko Nieminen53Lukas Lacko11.4%324.1%180.9%10
2012-11-12Marbella CH8032Clay73Daniel Gimeno Traver118Albert Montanes13.1%215.6%132.7%9
2012-11-12Yokohama CH8032Hard66Tatsuma Ito138Matteo Viola24.0%3113.3%224.2%13
2012-11-05Bratislava CH11032Hard57Lukas Lacko84Lukas Rosol10.3%274.3%180.8%8
2012-11-05Guayaquil CH9032Clay77Leonardo Mayer77Leonardo Mayer15.9%277.3%183.5%12
2012-11-05Knoxville CH8032Hard85Jesse Levine103Michael Russell16.9%268.2%181.7%8
2012-11-05Loughborough CH8032Hard83Tobias Kamke122Evgeny Donskoy18.4%269.3%182.2%9
2012-11-05Ortisei CH9032Hard23Andreas Seppi79Benjamin Becker12.7%245.5%161.1%7
2012-11-05Sao Leopoldo CH8032Clay98Andreas Haider Maurer95Horacio Zeballos14.7%226.5%143.3%10
2012-10-29Charlottesville CH9032Hard74Jesse Levine164Denis Kudla15.6%287.1%191.9%11
2012-10-29Eckental CH8032Carpet51Grega Zemlja131Daniel Brands15.5%257.4%172.0%10
2012-10-29Geneva CH10032Hard78Tobias Kamke188Marc Gicquel12.7%265.4%171.4%9
2012-10-29Medellin CH9032Clay71Leonardo Mayer76Paolo Lorenzi15.2%277.6%194.2%14
2012-10-29Montevideo CH8032Clay99Joao Sousa119Horacio Zeballos12.2%205.7%133.0%10
2012-10-22Buenos Aires CH9032Clay72Leonardo Mayer245Diego Sebastian Schwartzman13.5%256.9%173.3%12
2012-10-22Porto Alegre CH8032Clay98Ruben Ramirez Hidalgo178Simon Greul11.8%205.9%142.8%9
2012-10-22Seoul CH11032Hard70Yen Hsun Lu70Yen Hsun Lu14.5%316.6%201.7%11
2012-10-15Rio de Janeiro CH9032Clay91Ruben Ramirez Hidalgo174Gastao Elias12.9%246.6%173.5%12
2012-10-15Villa Allende CH8032Clay78Leonardo Mayer124Guillaume Rufin14.9%237.7%174.5%13
2012-10-08Rennes CH9032Hard90Aljaz Bedene144Kenny De Schepper15.2%286.9%182.1%11
2012-10-08San Juan CH8032Clay81Leonardo Mayer150Thiemo De Bakker11.9%206.1%142.9%9
2012-10-08Tashkent CH12532Hard59Lukas Lacko195Uladzimir Ignatik14.1%366.2%241.8%14
2012-10-08Tiburon CH10032Hard84Benjamin Becker220Jack Sock14.1%286.2%181.8%11
2012-10-01Belem CH8032Hard126Thiago Alves366Ricardo Hocevar33.4%3819.4%288.4%18
2012-10-01Mons CH12532Hard48David Goffin202Kenny De Schepper8.5%272.5%140.5%8
2012-10-01Quito CH8032Clay132Frederico Gil152Joao Souza18.5%269.6%185.5%14
2012-10-01Sacramento CH10032Hard85Benjamin Becker97James Blake16.6%316.9%202.2%12
2012-09-24Lermontov CH9032Clay83Paolo Lorenzi91Andrey Kuznetsov18.3%319.8%224.6%14
2012-09-24Madrid CH8032Clay89Filippo Volandri74Daniel Gimeno Traver12.4%205.4%132.6%9
2012-09-24Orleans CH12532Hard18Philipp Kohlschreiber55David Goffin7.1%252.1%140.6%9
2012-09-17Campinas CH8032Clay88Alex Bogomolov Jr141Guido Pella15.7%247.8%163.9%11
2012-09-17Izmir CH9032Hard113Malek Jaziri125Dmitry Tursunov16.0%287.7%192.3%11
2012-09-17Szczecin CH12532Clay75Filippo Volandri80Victor Hanescu11.5%314.4%182.3%13
2012-09-17Trnava CH9032Clay86Lukas Rosol116Andrey Kuznetsov14.4%266.7%173.2%12
2012-09-10Banja Luka CH10032Clay77Blaz Kavcic97Victor Hanescu17.0%328.3%223.8%14
2012-09-10Cali CH10032Clay43Santiago Giraldo171Joao Souza14.3%286.4%183.0%12
2012-09-10Istanbul CH9032Hard104Malek Jaziri147Dmitry Tursunov16.1%287.3%192.4%12
2012-09-10Ningbo CH8032Hard59Yen Hsun Lu204Peter Gojowczyk23.1%3111.7%224.3%14
2012-09-10Petange CH9032Hard66Gilles Muller87Tobias Kamke14.0%266.5%171.9%10
2012-09-10Seville CH9032Clay89Roberto Bautista Agut113Daniel Gimeno Traver12.2%245.6%162.6%11
2012-09-10Todi CH8032Clay72Paolo Lorenzi126Andrey Kuznetsov15.5%237.2%153.6%10
2012-09-04Alphen aan den Rijn CH8032Clay96Daniel Gimeno Traver187Thiemo De Bakker14.2%227.0%153.4%10
2012-09-04Brasov CH8032Clay102Victor Hanescu156Andreas Haider Maurer17.4%269.0%184.2%12
2012-09-04Genova CH11032Clay27Andreas Seppi111Albert Montanes9.9%264.2%171.8%11
2012-09-04St. Remy CH8032Hard53Gilles Muller147Josselin Ouanna15.7%246.7%142.0%9
2012-09-03Shanghai CH8032Hard64Yen Hsun Lu64Yen Hsun Lu19.3%289.1%192.9%12
2012-08-27Bangkok CH8032Hard109Dudi Sela109Dudi Sela23.6%3212.3%224.4%14
2012-08-27Como CH8032Clay113Frederico Gil156Andreas Haider Maurer13.2%216.3%143.1%9
2012-08-20Segovia CH9032Hard102Daniel Gimeno Traver140Evgeny Donskoy24.9%3715.1%285.5%17
2012-08-13Cordenons CH11032Clay69Blaz Kavcic93Paolo Lorenzi11.2%264.5%172.3%12
2012-08-13Karshi CH8032Hard145Igor Kunitsyn145Igor Kunitsyn30.4%3819.9%308.3%20
2012-08-06Aptos CH10032Hard78Brian Baker378Steve Johnson13.4%266.0%171.4%9
2012-08-06Pozoblanco CH8032Hard110Roberto Bautista Agut110Roberto Bautista Agut19.2%279.8%182.7%9
2012-08-06Samarkand CH8032Clay144Igor Kunitsyn168Dusan Lajovic23.6%3212.8%236.9%16
2012-08-06San Marino CH11032Clay52Martin Klizan52Martin Klizan13.5%295.5%182.7%12
2012-08-06Sibiu CH8032Clay105Adrian Ungur105Adrian Ungur15.2%236.9%153.4%10
2012-07-30Beijing CH10032Hard83Aljaz Bedene114Grega Zemlja20.8%3610.9%253.2%14
2012-07-30Manta CH8032Hard133Joao Souza185Guido Pella40.1%4427.5%3510.9%21
2012-07-30Vancouver CH10032Hard102Igor Sijsling102Igor Sijsling14.1%286.5%191.6%10
2012-07-23Astana CH11032Hard100Cedrik Marcel Stebe173Evgeny Donskoy23.1%4411.8%304.0%19
2012-07-23Lexington CH8032Hard179Maxime Authom209Denis Kudla25.9%3314.7%244.7%14
2012-07-23Oberstaufen CH8032Clay104Daniel Gimeno Traver234Dominik Meffert14.2%225.6%133.0%9
2012-07-23Orbetello CH8032Clay123Roberto Bautista Agut123Roberto Bautista Agut18.4%268.1%174.3%11
2012-07-23Tampere CH8032Clay145Joao Sousa145Joao Sousa18.7%268.2%164.4%12
2012-07-23Wuhan CH8032Hard103Aljaz Bedene103Aljaz Bedene26.0%3314.5%244.9%14
2012-07-16An-Ning CH8032Clay114Aljaz Bedene119Grega Zemlja18.6%278.7%184.2%12
2012-07-16Bercuit CH8032Clay75Steve Darcis241Thiemo De Bakker14.4%226.1%142.8%9
2012-07-16Binghamton CH8032Hard112Dudi Sela261Michael Yani19.1%289.5%192.7%11
2012-07-16Granby CH9032Hard109Vasek Pospisil109Vasek Pospisil24.2%3612.0%244.0%15
2012-07-16Penza CH8032Hard171Alexander Kudryavtsev440Illya Marchenko28.3%3516.5%266.0%16
2012-07-16Poznan CH8032Clay87Jerzy Janowicz87Jerzy Janowicz16.1%247.3%163.5%10
2012-07-16Recanati CH8032Hard69Malek Jaziri121Simone Bolelli25.3%3413.6%254.6%15
2012-07-09Bogota CH12532Clay29Feliciano Lopez58Alejandro Falla14.0%385.5%243.1%19
2012-07-09San Benedetto CH8032Clay159Andreas Haider Maurer223Gianluca Naso17.9%257.6%164.5%12
2012-07-09Scheveningen CH9032Clay109Jerzy Janowicz109Jerzy Janowicz16.9%287.0%173.8%13
2012-07-09Timisoara CH8032Clay140Victor Hanescu140Victor Hanescu17.9%267.5%164.4%13
2012-07-03Arad CH8032Clay102Daniel Brands222Facundo Bagnis14.4%226.2%143.2%10
2012-07-03Panama City CH8032Clay112Michael Russell114Rogerio Dutra Silva18.4%268.3%174.5%12
2012-07-02Braunschweig CH12532Clay37Carlos Berlocq80Thomaz Bellucci9.4%273.0%151.6%12
2012-07-02Lima CH9032Clay121Eric Prodon333Guido Andreozzi19.8%319.3%215.1%15
2012-07-02Winnetka CH8032Hard124Benjamin Becker298John Patrick Smith14.5%246.0%141.4%7
2012-06-25Marburg CH8032Clay98Horacio Zeballos105Jan Hajek13.3%205.0%122.6%9
2012-06-25Milan CH8032Clay109Frederico Gil266Tommy Robredo13.1%205.1%122.6%9
2012-06-11Kosice CH8032Clay126Alessandro Giannessi129Aljaz Bedene12.7%205.8%133.2%10
2012-06-11Monza CH10032Clay99Albert Montanes125Daniel Gimeno Traver10.2%224.4%142.3%10
2012-06-11Nottingham2 CH9032Grass108Dudi Sela142Grega Zemlja11.9%245.8%161.3%8
2012-06-05Caltanissetta CH10032Clay52Alejandro Falla470Tommy Robredo11.5%244.3%142.3%10
2012-06-05Furth CH8032Clay83Sergiy Stakhovsky99Blaz Kavcic12.7%205.0%122.8%9
2012-06-05Nottingham CH9032Grass58Go Soeda157Benjamin Becker8.4%193.8%120.5%5
2012-06-04Prostejov CH12532Clay16Fernando Verdasco35Florian Mayer5.4%231.5%120.8%9
2012-05-14Bordeaux CH11032Clay55Jeremy Chardy97Martin Klizan9.5%233.5%141.8%10
2012-05-14Fergana CH8032Hard138Marco Chiudinelli297Yuki Bhambri21.9%3010.6%194.1%13
2012-05-07Athens CH8032Hard89Igor Kunitsyn105Marinko Matosevic15.9%259.2%191.9%8
2012-05-07Busan CH10032Hard58Yen Hsun Lu81Tatsuma Ito17.7%338.2%212.1%11
2012-05-07Prague CH10032Clay62Dudi Sela117Horacio Zeballos11.1%233.7%131.8%9
2012-05-07Rio Quente CH8032Hard114Paul Capdeville284Guilherme Clezar31.2%3821.3%306.8%16
2012-05-07Rome2 CH8032Clay55Gilles Muller189Jerzy Janowicz13.6%225.2%132.7%9
2012-04-30Ostrava CH8032Clay136Jan Hajek182Jonathan Dasnieres De Veigy19.8%278.9%174.7%12
2012-04-30Tunis CH12532Clay27Marcel Granollers97Ruben Ramirez Hidalgo12.7%344.7%202.3%13
2012-04-23Kaohsiung CH12532Hard56Yen Hsun Lu74Go Soeda14.7%367.7%262.1%14
2012-04-23Napoli CH8032Clay61Gilles Muller187Andrey Kuznetsov15.5%236.2%143.0%10
2012-04-23Sao Paulo2 CH8032Clay105Blaz Kavcic105Blaz Kavcic18.2%267.8%163.9%11
2012-04-23Savannah CH8032Clay88Dmitry Tursunov293Brian Baker17.0%256.8%153.3%10
2012-04-16Rome CH8032Clay84Ernests Gulbis149Roberto Bautista Agut9.5%183.7%111.8%7
2012-04-16Santos CH8032Clay99Joao Souza239Ivo Minar14.9%237.1%153.4%10
2012-04-16Sarasota CH10032Clay77James Blake98Sam Querrey11.9%254.5%142.3%10
2012-04-09Blumenau CH8032Clay112Blaz Kavcic150Antonio Veic19.7%2810.2%194.9%13
2012-04-09Leon CH8032Hard119Marinko Matosevic615Denis Zivkovic27.1%3517.4%276.6%17
2012-04-09Mersin CH8032Clay90Martin Klizan172Joao Sousa12.9%215.7%132.7%9
2012-04-09Pereira CH9032Clay53Santiago Giraldo248Carlos Salamanca15.5%297.1%193.2%12
2012-04-02Barletta CH8032Clay57Fabio Fognini174Aljaz Bedene12.2%204.8%122.4%8
2012-04-02San Luis Potosi CH8032Clay91Paolo Lorenzi125Ruben Ramirez Hidalgo20.7%2810.7%195.5%13
2012-04-02St. Brieuc CH8032Clay105Daniel Gimeno Traver261Gregoire Burquier16.1%237.5%153.7%11
2012-04-02Tallahassee CH8032Hard88Ryan Sweeting282Tim Smyczek12.9%226.4%151.5%8
2012-03-27Le Gosier CH11032Hard52Olivier Rochus148David Goffin9.6%254.0%161.2%10
2012-03-26Barranquilla CH9032Clay71Alejandro Falla71Alejandro Falla15.4%267.0%173.4%11
2012-03-19Bath CH8032Hard97Andreas Beck172Dustin Brown14.2%247.4%172.2%10
2012-03-19Marrakech CH8032Clay87Pere Riba106Martin Klizan12.2%205.1%132.3%8
2012-03-19Rimouski CH8032Hard94Tatsuma Ito111Vasek Pospisil20.6%2912.3%224.2%13
2012-03-13Dallas2 CH12532Hard24Marin Cilic175Frank Dancevic6.8%242.7%150.5%7
2012-03-12Guadalajara CH10032Hard87Edouard Roger Vasselin216Thiago Alves13.4%276.1%171.4%9
2012-03-12Pingguo CH8032Hard77Go Soeda77Go Soeda20.2%2811.5%203.5%11
2012-03-12Rabat CH8032Clay60Filippo Volandri118Martin Klizan13.0%215.0%132.4%8
2012-03-12Sarajevo CH8032Hard96Andreas Beck242Jan Hernych15.5%258.3%192.3%11
2012-03-05Kyoto CH8032Carpet77Go Soeda105Tatsuma Ito18.9%2810.4%203.0%11
2012-03-05Santiago CH8032Clay103Eric Prodon137Paul Capdeville14.9%226.2%133.1%9