Ukrainian boxer Oleksandr Usyk (24-0, 15 KOs) etched his name in the annals of world boxing history by becoming the first undisputed heavyweight champion in the four-belt era. He earned this title on July 19, 2025, by knocking out Britain's Daniel Dubois (22-3, 21 KOs) in their rematch at the legendary Wembley Stadium in London.

How the Rematch with Dubois Went

From the start, Dubois tried to apply pressure, using his size and targeting the body—mindful of the controversial low blow in their first fight. Usyk, however, controlled the ring, outpacing his opponent with precise punches and agile footwork. Initially, it seemed Dubois was dictating the pace, but Usyk managed to turn the tide in the fifth round: first a knockdown, then a powerful punch to the jaw—sending Dubois to the canvas. The blow was so strong that Dubois' mouthguard even fell out, resulting in a knockout victory and the historic unification of titles became a fact.

Usyk's Titles

After the triumphant victory over Dubois at Wembley, Oleksandr Usyk unified all the major heavyweight division titles, becoming the rightful undisputed world champion. As of July 2025, he holds the following championship belts:

• WBA Super — World Boxing Association (5th defense)
• WBO — World Boxing Organization (5th defense)
• IBF — International Boxing Federation (taken from Dubois)
• WBC — World Boxing Council (2nd defense)
• The Ring — The Ring magazine, symbolic lineal championship belt (4th defense)
• IBO — International Boxing Organization (not part of the "big four," but recognized in title fights)

Usyk's Recent Fights

On the path to undisputed championship, Oleksandr Usyk engaged in several key bouts against elite opponents. Below is a brief overview of his last six fights, each marking an important milestone in his legendary career:

• Daniel Dubois — London, Wembley, July 19, 2025. Win by knockout in the 5th round. Usyk unified all heavyweight belts and became the undisputed champion.
• Tyson Fury — Riyadh, Kingdom Arena, December 21, 2024. Win by unanimous decision (UD). Confident defense of all titles in the rematch.
• Tyson Fury — Riyadh, Kingdom Arena, May 18, 2024. Win by split decision (SD). Usyk became the undisputed world champion in heavyweight, taking the WBC belt.
• Daniel Dubois — Wroclaw, Wroclaw Stadium, August 26, 2023. Win by knockout in the 9th round. Title defense. Controversial low blow in the 5th round.
• Anthony Joshua — Jeddah, King Abdullah Sports City, August 20, 2022. Win by split decision (SD). Usyk defended titles and claimed The Ring belt.
• Anthony Joshua — London, Tottenham Hotspur Stadium, September 25, 2021. Win by unanimous decision (UD). Usyk claimed the WBA Super, WBO, IBF, and IBO titles.

Historic Achievement

The victory over Dubois solidified Oleksandr Usyk's status as one of the greatest boxers of the modern era. He became the first in history to be the undisputed heavyweight champion in the four-belt era and remains the only three-time undisputed world champion in two weight categories.

Usyk first conquered the cruiserweight division, winning all the belts in 2018. He then became the undisputed champion twice in the heavyweight division—first after defeating Tyson Fury in May 2024, and then reaffirmed his status in the rematch with Dubois in July 2025.