Hasim Sharif Rahman is an American former professional boxer who competed from 1994 to 2014. He is a two-time world heavyweight champion, having held the unified WBC, IBF, IBO and lineal titles in 2001; and the WBC title again from 2005 to 2006. He was ranked as a top 10 heavyweight by BoxRec from 2000 to 2007, and reached his highest ranking of world No.6 in 2000.
Wladimir Klitschko is a Ukrainian former professional boxer who competed from 1996 to 2017. He held the world heavyweight championship twice, including the unified WBA (Super), IBF, WBO, IBO, and Ring magazine titles. A strategic and intelligent boxer, Klitschko is considered to be one of the greatest heavyweight champions of all time. He was known for his exceptional knockout power, using a strong jab, straight right hand and left hook, quick hand speed, great physical strength which he employed when clinching opponents, and his athletic footwork and mobility, unusual for boxers of his size.
Lamon Tajuan Brewster is an American former professional boxer who competed from 1996 to 2010. He held the WBO heavyweight title from 2004 to 2006, and is best known for scoring an upset knockout victory over Wladimir Klitschko to win the vacant title. He was ranked as the world's No.8 heavyweight by BoxRec at the conclusion of 2004. As an amateur, Brewster won the U.S. national championships in 1995, and a silver medal at that year's Pan American Games, both in the heavyweight division. Following his retirement from the sport in 2011, he became an entrepreneur and founded a consulting business.
Samuel Okon Peter is a Nigerian professional boxer. He held the WBC heavyweight title in 2008, when he stopped Oleg Maskaev in six rounds. In his prime, he was known for his rivalry with the Klitschko brothers, having faced Wladimir twice and Vitali once. Peter was named among the 20 greatest athletes in the history of independent Nigeria by The Punch in 2023, while his capturing of the WBC heavyweight title was ranked the 26th most memorable moment in independent Nigeria's sports history by Premium Times in 2020. He was ranked by The Ring among ten best heavyweights at the conclusion of a year from 2005 to 2008, reaching his highest ranking of world No.2 in 2007. Peter is known for his punching power and holds a 78.9% knockout-to-win ratio.
Christopher Cornelius Byrd is an American former professional boxer who competed from 1993 to 2009. He is a two-time world heavyweight champion, having first won the WBO title in 2000 after an upset corner stoppage over then-undefeated Vitali Klitschko. In his first title defense later that year, he lost to Vitali's brother Wladimir Klitschko. In 2002, Byrd defeated Evander Holyfield to win the IBF heavyweight title for his second reign as world champion. He made four successful defenses until losing his title again to Wladimir Klitschko in a 2006 rematch. He was ranked by BoxRec in the world's top 10 heavyweight from 1998 to 2004, reaching his highest ranking of No.3 in 2000.
Jameel McCline is an American former professional boxer. He challenged for the world heavyweight title on an unprecedented four occasions, losing all four attempts to Wladimir Klitschko, Chris Byrd, Nikolai Valuev and Samuel Peter. Despite never winning a world title, McCline did defeat former champions and top contenders in Michael Grant, Lance Whitaker, Al Cole, Cedric Boswell and Shannon Briggs. McCline retired in 2012 at the age of 42.
Sultan-Ahmed Magomedsalihovich Ibragimov is a Russian former professional boxer. He competed from 2002 to 2008, and held the WBO world heavyweight title from 2007 to 2008. He was ranked by The Ring as the world's sixth best active heavyweight at the conclusion of 2007 and 2008. As an amateur he won silver medals at the 2000 Olympics and 2000 European Championships, and bronze at the 2001 World Championships, all in the heavyweight division.
Derrick Lavon Jefferson is an American former professional boxer. He challenged once for the WBO title in 2001, and is perhaps best remembered for his brutal left hook-knockout of Maurice Harris in 1999.
Anthony Tyrone Thompson is an American former professional boxer who competed from 2000 to 2016. He challenged twice for unified world heavyweight titles, in 2008 and 2012, both times against Wladimir Klitschko. Described by many observers and fighters as stylistically "awkward", Thompson was ranked by The Ring as the ninth best heavyweight in the world at the end of 2007.
Vitali Klitschko and Wladimir Klitschko, known as the Klitschko Brothers, are Ukrainian former professional boxers. During their peak years between 2004 and 2015, they were considered the dominant world heavyweight champions of their era, and among the most successful champions in boxing history. In 2011, they entered the Guinness World Records book as brothers with most world heavyweight title fight wins. In the years following the retirement of heavyweight titlist Lennox Lewis in 2004, the Klitschko brothers would eventually accumulate all four major world heavyweight titles. Known for their exceptionally large physiques, speed, and punching power, they each developed a style that utilized their athleticism and arm reach to break down opponents.
Edward Chambers is an American former professional boxer. He challenged once for a unified world heavyweight title in 2010. He was ranked as the fourth best heavyweight in the world by The Ring at the conclusion of 2009. A defensively-oriented fighter, Chambers has been widely credited for his counterpunching skills and particularly praised for his hand speed and footwork. He has also been one of the first heavyweights with ability to switch between fighting orthodox and southpaw.
Mariusz Wach is a Polish professional boxer. He challenged once for the unified WBA (Super), IBF, WBO, and IBO heavyweight titles against Wladimir Klitschko in 2012.
Chris Byrd vs. Wladimir Klitschko II, billed as "Revenge Is The Name Of The Game", was a professional boxing match contested on 22 April 2006 for the IBF and vacant IBO heavyweight championship.
Wladimir Klitschko vs. Sultan Ibragimov, billed as "The Unification", was a professional boxing match contested on 23 February 2008 for the IBF, WBO and IBO heavyweight championship.
Wladimir Klitschko vs. Hasim Rahman, billed as "X-Plosive", was a professional boxing match contested on 13 December 2008 for the IBF, WBO, and IBO heavyweight championship.
Wladimir Klitschko vs. Corrie Sanders, billed as The Next Big Thing was a professional boxing match contested on 8 March 2003 for the WBO Heavyweight Championship.
Wladimir Klitschko vs. Lamon Brewster was a professional boxing match contested on April 10 2004, at the Mandalay Bay Resort & Casino in Las Vegas, Nevada, for the WBO Heavyweight Championship.
Wladimir Klitschko vs. Lamon Brewster II, was a professional boxing match contested on 7 July 2007 for the IBF Heavyweight Championship.
Wladimir Klitschko vs. Samuel Peter, billed as "Boardwalk Brawls", was a professional boxing match contested on 24 September 2005.
Jason Estrada 
Samuel Peter 
Gilbert Martinez
Elieser Castillo 
Wladimir Klitschko 
Jimmy Thunder 
Tui Toia
Kirk Holyfield