Name each fighter's career signature opponent?

Notable victories
Duran- Leonard, DeJesus, Buchanan, Barkley, Cuevas, Palomino, Ishimatsu, Mamby, Viruet, Marcel, Kobayashi
Sugar Ray Leonard- Hagler, Hearns, Duran, Benitez, Mayweather, Lalonde
Marvin Hagler- Hearns, Duran, Mugabi, Minter, Antuofermo, Hamsho
Salvador Sanchez- Gomez, Lopez, Nelson, Laporte
Michael Spinks- Holmes, ****ey, Qawi, Muhammad, Johnson
Tommy Hearns- Duran, Curry, Hill, Cuevas, Benitez
Julio Cesar Chavez- Haugen, Taylor, Camarcho, Mayweather, Rosario, Laporte, Lockridge, Limon
Mike Tyson- Ruddock, Berbick, Thomas, Spinks, Holmes, Golota,
Aaron Pryor - Arguello, Cervantes
Larry Holmes- Norton, Witherspoon, ****ey, Berbick, Mercer, Ali, Shavers
Pernell Whitaker- Mayweather, Haugen, Nelson, McGirt
Roy Jones Jr.- Hopkins, Toney, McCallum, Hill, Tarver, Ruiz
James Toney- McCallum, Nunn, Jirov, Holyfield, Ruiz
Evander Holyfield- Tyson, Bowe, Moorer, Holmes, Foreman, Thomas, Dokes, Ruiz,
Bernard Hopkins- Trinidad, De La Hoya, Joppy, Wright, Tarver, Pavlik, Jones, Pascal
Felix Trinidad- Whitaker, De La Hoya, Camacho, Vargas, Joppy, Mayorga
Ricardo Lopez-
Oscar De La Hoya- Chavez, Whitaker, Hernandez, Quartey, Mayorga, Sturm
Terry Norris- Leonard, Mugabi, Taylor
Manny Pacquiao- Marquez, Morales, Barrera, De La Hoya, Cotto, Bradley, Margarito, Mosley, Hatton, Ledwaba
Floyd Mayweather Jr.- Pacquiao, De La Hoya, Alvarez, Castillo, Corrales, Mosley, Cotto, Hernandez, Marquez
Erik Morales- Pacquiao, Barrera, Zaragoza, Ayala,
Joe Calzaghe- Kessler, Bika, Hopkins, Jones
Juan Manuel Marquez- Pacquiao, Barrera,
Marco Antonio Barrera- Morales, Hamed, Tapia, Ayala
Pongsaklek Wonjongkam- Naito, Sosa, Kameda,
Sergio Martinez- Pavlik, Williams, Chavez Jr.
Nonito Donaire- Darchinyan, Montiel, Narvaez
Guillermo Rigondeaux- Donaire
Roman Gonzalez- Estrada, Viloria, Sosa, Yaegashi
Wladimir Klitschko- Povetkin, Haye, Thompson, Peter, Pulev, Chagaev
Lennox Lewis- Tyson, Holyfield, Tua, Golota, Mercer, Ruddock
Sergey Kovalev- Hopkins, Pascal
Gennady Golovkin- Lemieux
Andre Ward- Froch, Kessler, Bika, Abraham

Older Greats victories for comparison
Ray Robinson- Angott, Zivic, Armstrong, LaMotta, Gavilan, Villemain, Fullmer, Basilio, Graziano, Olson
Henry Armstrong- Arizmendi, Ross, Ambers, Garcia, Angott, Wolgast, Jenkins, Zivic,
Harry Greb- Tunney, Walker, Loughran, Gibbons, Norfolk, Slattery, Smith, Levinsky, Miske
Sam Langford- Jeanette, McVey, Wills, Norfolk, Flowers, Gans, Godfrey, O'Brien
Archie Moore- Bivins, Chase, Williams, Johnson, Satterfield, Maxim, Olson, Cocoa Kid, Marshall
Muhammad Ali- Liston, Moore, Patterson, Frazier, Foreman, Norton, Ellis, Quarry
Ezzard Charles- Louis, Walcott, Moore, Bivins, Burley, Maxim, Yarosz, Overlin, Marhsall, Christoforidis, Lesnevich
Benny Leonard- Welsh, Dundee, Kilbane, Britton, White, Tendler
Mickey Walker- Britton, Tendler, Flowers, Levinsky, Uzcudun, Rosenbloom
Willie Pep- Saddler, Wright, Ortiz, Famechon
Barney Ross- McLarnin, Canzoneri, Battalino, Garcia
Tony Canzoneri- McLarnin, Ambers, Dundee, Singer, Berg, Chocolate, Arizmendi

 

Wilder/Fury

 

Mayweather-Baldimor

 

9G - Kassim Ouma

Avocado Algieri - Manny Pacquiao

 

Tim Bradley - Marquez, Provodnikov, Peterson, Rios, Pacquiao, Vargas, Witter, Abregu, Holt, Vazquez, Alexander, Casamayor