Heavyweight:

IBF - Wladimir Klitschko - Ukraine
WBC - Oleg Maskaev - USA
WBA - Ruslan Chagaev - Germany
WBO - Sultan Ibragimov - Russia

Cruiserweight:

IBF - Steve Cunningham - USA
WBC - David Haye - UK
WBA - Firat Arslan - Germany
WBO - Enzo Maccarinelli - UK

Light Heavyweight:

IBF - Clinton Woods - UK
WBC - Chad Dawson - USA
WBA - Stipe Drews - Croatia
WBO - Zsolt Erdei - Germany

Super Middleweight:

IBF - Lucian Bute - Canada
WBC - Joe Calzaghe - UK
WBA - Joe Calzaghe - UK
WBO - Joe Calzaghe - UK

Middleweight:

IBF - Arthur Abraham - Germany
WBC - Kelly Pavlik - USA
WBA - Felix Sturm - Germany
WBO - Kelly Pavlik - USA

Light Middleweight:

IBF - Cory Spinks - USA
WBC - Vernon Forrest - USA
WBA - Joachim Alcine - Canada
WBO - Sergiy Dzinziruk - Ukraine

Welterweight:

IBF - Kermit Cintron - USA
WBC - Floyd Mayweather Jr - USA
WBA - Miguel Angel Cotto - Puerto Rico
WBO - Paul Williams - USA

Light Welterweight:

IBF - Paul Malignaggi - USA
WBC - Junior Witter - UK
WBA - Gavin Rees - UK
WBO - Ricardo Torres - Bolivia

Lightweight:

IBF - Juan Diaz - USA
WBC - David Diaz - USA
WBA - Juan Diaz - USA
WBO - Juan Diaz - USA

Super Featherweight:

IBF - Mzonke Fana - South Africa
WBC - Juan Manuel Marquez - USA
WBA - Edwin Valero - Japan
WBO - Joan Guzman - USA

Featherweight:

IBF - Robert Guerrero - USA
WBC - Jorge Linares - Japan
WBA - Chris John - Indonesia
WBO - Steven Luevano - USA

Super Bantamweight:

IBF - Steve Molitor - Canada
WBC - Israel Vazquez - USA
WBA - Celestino Caballero - Panama
WBO - Daniel Ponce de Leon - USA

Bantamweight:

IBF - Joseph Agbeko - USA
WBC - Hozumi Hasegawa - Japan
WBA - Wladimir Sidorenko - Germany
WBO - Gerry Penalosa - Philippines

Super Flyweight:

IBF - Dimitri Kirilov - Russia
WBC - Cristian Mijares - Mexico
WBA - Alexander Munoz - Venezuala
WBO - Fernando Montiel - Mexico

Flyweight:

IBF - Nonito Donaire - USA
WBC - Daisuke Naito - Japan
WBA - Takefumi Sakata - Japan
WBO - Omar Andres Narvaez - Argentina

Light Flyweight:

IBF - Ulises Solis - Mexico
WBC - Edgar Sosa - Mexico
WBA - Juan Carlos Reveco - Argentina
WBO - Ivan Calderon - Puerto Rico

Minimumweight:

IBF - Florante Condes - Philippines
WBC - Oleydong Sithsamerchai - Thailand
WBA - Yutaka Niida - Japan
WBO - Donnie Nietes - Philippines