Question: Danny Williams is best known for scoring an upset knockout victory against what former professional boxer who won his first 19 professional fights by knockout?

full_context: Document 1: Lennox Lewis vs. Mike Tyson: Lennox Lewis vs. Mike Tyson, billed as "Lewis–Tyson: Is On", was a professional boxing match that took place on June 8, 2002 at the Pyramid Arena in Memphis, Tennessee, United States, between IBF, IBO and WBC heavyweight champion Lennox Lewis and former IBF, WBA and WBC heavyweight champion Mike Tyson. The fight was for Lewis' heavyweight championship titles. Lewis defeated Tyson by knockout in the eighth round.
Document 2: Samuel Peter: Samuel Okon Peter (born September 6, 1980) is a Nigerian-American professional boxer who held the WBC heavyweight title in 2008. He rose to prominence in his early career following a string of knockout wins, at a time when the titles of the heavyweight division were largely fragmented. In March 2008, Peter won a portion of the world heavyweight championship by knocking out Oleg Maskaev to win the WBC title. In October, in what would be his only defense of the title, Peter lost to a returning Vitali Klitschko, who stopped him in eight rounds. Peter is known for his rivalry with the Klitschko brothers, having faced Wladimir twice (in 2005 and 2010) and Vitali once.
Document 3: Klitschko brothers: Vitali Klitschko (born 19 July 1971) and Wladimir Klitschko (born 25 March 1976), collectively known as the Klitschko brothers are Ukrainian heavyweight boxers. During their peak years from 2004 until 2015, the Klitschko brothers were considered the most dominant heavyweight champions of their era, and amongst the most successful champions in boxing history. After the retirement of boxing legend Lennox Lewis, the Klitschko brothers held all heavyweight boxing world titles. Known for their exceptionally large frames and robotic boxing styles, the Klitschko brothers developed a style that utilized their athleticism and using their reach to break down opponents.
Document 4: Wladimir Klitschko: Wladimir Wladimirowitsch Klitschko (born 25 March 1976) is a Ukrainian former professional boxer who competed from 1996 to 2017. He is a two-time world heavyweight champion, having held the WBA (Super), IBF and WBO titles, as well as the IBO, "Ring" magazine, and lineal 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, utilising a strong jab, straight right hand and left hook.
Document 5: David Haye: David Deron Haye (born 13 October 1980) is a British professional boxer who has held world titles in two weight classes. He is the first British boxer to reach the final of the World Amateur Boxing Championships, where he won a silver medal in 2001. As a professional he became the first British boxer to become a unified cruiserweight world champion in 2008, winning three of the four major world titles, as well as the "Ring" magazine and lineal titles. In the same year he moved up to heavyweight, and became the WBA champion in 2009 after defeating Nikolai Valuev, who had a world record 9 in height and 99 lb weight advantage on Haye.
Document 6: Danny Williams (boxer): Daniel Peter "Danny" Williams (born 13 July 1973) is a British professional boxer. A veteran of the sport since 1995, he held the British heavyweight title twice between 2000 and 2010, and the Commonwealth heavyweight title twice between 1999 and 2006. Williams is best known for scoring an upset knockout victory against Mike Tyson in 2004, which earned him a mandatory WBC heavyweight title opportunity. In the same year, he challenged then-reigning champion Vitali Klitschko, but was stopped in eight rounds.
Document 7: Mike Tyson: Michael Gerard Tyson ( ; born June 30, 1966) is an American former professional boxer who competed from 1985 to 2005. He reigned as the undisputed world heavyweight champion and holds the record as the youngest boxer to win a heavyweight title at 20 years, 4 months and 22 days old. Tyson won his first 19 professional fights by knockout, 12 of them in the first round. He won the WBC title in 1986 after stopping Trevor Berbick in two rounds, and added the WBA and IBF titles after defeating James Smith and Tony Tucker in 1987. This made Tyson the first heavyweight boxer to simultaneously hold the WBA, WBC and IBF titles, and the only heavyweight to successively unify them.
Document 8: Tyson Fury: Tyson Luke Fury (born 12 August 1988) is a British professional boxer. He has held the "Ring" magazine heavyweight title since 2015, after defeating long-reigning world champion Wladimir Klitschko. In the same fight, Fury also won the unified WBA (Super), IBF, WBO, IBO and lineal titles, with the victory earning him Fighter of the Year and Upset of the Year awards by "The Ring". Fury was subsequently stripped of the IBF title later that year for being unable to grant a fight against their mandatory challenger, Vyacheslav Glazkov, due to agreeing to a rematch with Klitschko. In 2016, Fury vacated the WBA, WBO, IBO, and lineal titles following an ongoing medical investigation and personal issues and two cancellations of the Klitschko rematch. In August 2016, Fury was ranked by BoxRec as the world's sixth best active boxer, pound for pound.
Document 9: Roy Jones Jr.: Roy Levesta Jones Jr. (born January 16, 1969) is an American professional boxer, boxing commentator, boxing trainer, rapper, and actor who holds dual American and Russian citizenship. He is a six-time former world champion in four weight classes, having held titles at middleweight, super middleweight, light heavyweight, and heavyweight; and is the only boxer in history to start his professional career at light middleweight and go on to win a heavyweight title. As an amateur he represented the United States at the 1988 Summer Olympics, winning a silver medal in the light middleweight division.
Document 10: James Tillis: James Tillis (born July 5, 1957) is a former professional boxer. Known as "Quick", he was known for his fast hand speed. Tillis challenged for the WBA world heavyweight title in 1981, but was defeated by fifteen round unanimous decision to Mike Weaver. Tillis was the first man to go the distance with a prime Mike Tyson in 1986. He holds notable wins over Ron Stander by TKO 7 in 1980, and the hard punching Earnie Shavers by ten-round decision in 1982. Tillis fought for the last time in 2001 at the age of 44.
Document 11: Mike Tyson vs. Buster Douglas: Mike Tyson vs. Buster Douglas, billed as "Tyson Is Back!", was a historic boxing match that occurred at the Tokyo Dome in Tokyo, Japan on February 11, 1990, in which then undefeated, undisputed heavyweight champion Mike Tyson lost via knockout to the 42–1 underdog Buster Douglas. The fight is widely considered one of the biggest upsets in sports history.
Document 12: Dariusz Michalczewski: Dariusz Michalczewski (born 5 May 1968) is a Polish-German former professional boxer who competed from 1991 to 2005. He is a two-weight world champion, having held multiple world titles at light-heavyweight, including the WBO title from 1994 to 2003; the unified WBA, IBF, and lineal titles in 1997; and the WBO junior-heavyweight title from 1994 to 1995.
Document 13: Mike Tyson vs. Evander Holyfield: Mike Tyson vs. Evander Holyfield, billed as "Finally", was a professional boxing match fought between Evander Holyfield and Mike Tyson for the World Boxing Association heavyweight championship on November 9, 1996 at the MGM Grand Garden Arena in Paradise, Nevada. The bout was Tyson's first defense of the WBA title that he had won from Bruce Seldon on September 7 of that year.
Document 14: Frank Bruno: Franklin Roy "Frank" Bruno, {'1': ", '2': ", '3': ", '4': "} (born 16 November 1961) is a British former professional boxer who competed from 1982 to 1996. Bruno had a highly publicised and extremely eventful career. The pinnacle of his boxing career was winning the WBC heavyweight title, in what was his fourth world championship challenge. He also held the European heavyweight title earlier in his career. Bruno was one of the most well-loved and recognisable boxers in British history, and faced multiple top-rated heavyweights during his career including two bouts with Mike Tyson and a domestic clash against Lennox Lewis. He won the WBC title in 1995 after defeating Oliver McCall at a packed Wembley Stadium. Bruno was known for his excellent punching power: he won 40 of his 45 bouts and 38 by knockout, giving him a 95% knockout rate from the fights he won; his overall knockout percentage is 84.44%. Like Henry Cooper before him, Bruno has remained a popular celebrity with the British public following his retirement from boxing.
Document 15: Buster Douglas: James "Buster" Douglas (born April 7, 1960) is an American former professional boxer who competed from 1981 to 1990, and 1996 to 1999. He is best known for his stunning upset of Mike Tyson on February 11, 1990 in Tokyo to win the undisputed heavyweight title. At the time Tyson was undefeated and considered to be the best boxer in the world, as well as one of the most feared heavyweight champions in history due to his domination of the division over the previous three years. The only casino to make odds for the fight (all others declining to do so as they considered the fight such a foregone conclusion) had Douglas as a 42-to-1 underdog for the fight, making his victory, in commentator Jim Lampley's words, "The biggest upset in the history of heavyweight championship fights." Douglas held the title for eight months and two weeks, losing on October 25, 1990 to Evander Holyfield via third-round knockout, in his only title defense.
ground_truth: Michael Gerard Tyson