テレンス・クロフォード
In 2018 Usyk became the fourth male boxer in history to simultaneously hold the WBA, WBC, IBF, and WBO titles, after Jermain Taylor, Bernard Hopkins and Terence Crawford. He was the first Ukrainian undisputed champion. He is particularly notable for the speed of his accomplishments, winning his first world title in his tenth fight, and becoming the undisputed champion of his weight class by his fifteenth fight. Usyk vacated his cruiserweight titles in 2019 to move up to heavyweight. By that point, in sixteen fights he had defeated five current or former world champions.