Oleksandr Usyk is a Ukrainian professional boxer, Olympic gold-medalist and two-division world champion best known for his technical southpaw style and ring IQ. He won Olympic gold at light-heavyweight for Ukraine at the 2012 London Games and compiled an outstanding amateur record before turning pro[1][3]. As a professional, Usyk became the undisputed cruiserweight champion by holding the WBA (Super), WBC‑recognized lineal status, IBF and WBO titles simultaneously—becoming the first cruiserweight to hold all four major belts—and then moved up to heavyweight where he captured the WBA (Super), IBF, WBO and Ring magazine heavyweight titles after defeating Anthony Joshua in 2021[2][3]. He successfully defended the heavyweight belts multiple times, including a high-profile rematch with Joshua in 2022, and later defeated Tyson Fury to become undisputed again in 2025, solidifying his place among the era’s top heavyweights[3]. Usyk’s professional record is unbeaten and has included both decision wins and notable stoppages, with a KO percentage reflecting his combination of skill and finishing ability[3][5][6]. Usyk is widely regarded as one of Ukraine’s greatest boxers and among the top pound‑for‑pound fighters of his generation because of his footwork, ring generalship, and adaptability moving between weight classes[2][3]. Outside the ring, he is a public figure in Ukraine; his career and earnings have drawn international attention and substantial purses for major bouts[4]. Recently, Usyk’s reclaiming of undisputed heavyweight status and his remaining active championship defenses keep him highly relevant in global boxing, with fans and analysts monitoring potential future matchups at heavyweight[3]. Statistical and biographical details such as height (6'3"), southpaw stance, and professional record are maintained in official boxing databases and profiles[6][5].