Boxing has a problem. Four major sanctioning bodies. Seventeen weight classes. That means there can be up to 68 different ‘world champions’ at any one time.
Undisputed champions cut through the noise. They hold all four belts. WBA, WBC, IBF and WBO. One fighter. One division. No arguments.
It is one of the rarest achievements in the sport. Only 11 men have done it in the modern four-belt era. To follow every championship card across boxing’s biggest divisions, BetVictor’s boxing news hub covers every update.
This guide explains what undisputed status means, how the four-belt era began, who has achieved it, and who could be next.
What Does ‘Undisputed’ Actually Mean?
An undisputed champion holds every major world title in their division at the same time. In boxing, that means winning all four belts from the four major sanctioning bodies. The WBA. The WBC. The IBF. And the WBO.
There is no other type of ‘undisputed’ in modern boxing. Holding three of the four belts makes you a unified champion, not undisputed. The difference matters because the fourth belt usually sits with a separate world-class rival who has to be beaten or politicked out of contention.
Beating that fourth opponent is what makes undisputed status so prized. It is the closest thing in modern boxing to a single, universally recognised world champion.
How the Four-Belt Era Began
The Four Sanctioning Bodies
Boxing’s four major sanctioning bodies came together at different times. The WBA dates back to 1921, the WBC to 1963, the IBF to 1983, and the WBO to 1988. For a complete look at how the 17 weight classes are structured across all four bodies, our boxing weight classes guide is the place to start.
The WBO Recognition Problem
For years, the WBO was treated as a minor body. The WBA, WBC and IBF dominated mainstream boxing recognition. The WBO had to fight for its seat at the table.
That started to change in 2001. The WBA began giving WBO champions the same recognition as their own titlists. The WBC followed in 2004. The IBF held out until early 2007.
Hopkins Sets the Standard
Bernard Hopkins made history first. On 18 September 2004, he stopped Oscar De La Hoya with a body shot in the ninth round. The win added the WBO middleweight title to his existing WBA, WBC and IBF belts.
Hopkins became the first ever undisputed champion in the four-belt era. He also helped legitimise the WBO as a major sanctioning body in the process. The modern era of undisputed status was born.
Why Undisputed Status Is So Rare
Mandatory Challenges Force Vacancies
Each of the four sanctioning bodies has its own mandatory challenger queue. A champion who skips one mandatory defence to chase a unification fight risks getting stripped. That makes it almost impossible to hold all four belts for long.
The Politics of Promotion
Boxing’s biggest fighters are signed to different promoters. PBC, Top Rank, Matchroom, Queensberry and Golden Boy all guard their own talent. Getting fighters from rival promoters into the same ring is one of boxing’s oldest political headaches.
Saudi Arabia’s recent involvement has helped. Turki Alalshikh and his Riyadh Season cards have funded several fights that previously seemed impossible. The Tyson Fury versus Oleksandr Usyk unification in May 2024 was one of those.
Sanctioning Body Stripping
Sometimes a fighter wins all four belts. Then loses one of them within months. Sometimes within weeks. The sanctioning bodies often strip a champion for failing to defend within a set time period.
That is what happened to Jermain Taylor. He won all four middleweight titles in July 2005 by beating Bernard Hopkins. The IBF stripped him almost immediately for agreeing to a rematch with Hopkins rather than fighting their own mandatory.
Current Undisputed Champions in 2026
As of June 2026, there is only one current undisputed champion in men’s boxing.
Naoya Inoue (Super Bantamweight)
Japan’s Naoya Inoue holds all four super bantamweight belts. He became undisputed in December 2023 with a tenth-round knockout of Marlon Tapales. That fight came less than a year after he had achieved undisputed status at bantamweight.
Inoue has since defended his super bantamweight crown multiple times. His May 2026 unanimous decision win over Junto Nakatani also took him to number one in the pound-for-pound rankings. At 33-0 with 27 knockouts, ‘The Monster’ is the longest-reigning current undisputed champion in the sport.
The Recent Usyk Situation
Oleksandr Usyk briefly held all four heavyweight belts after beating Tyson Fury in May 2024. He then voluntarily relinquished his WBO title in November 2025 to avoid a mandatory challenger.
Daniel Dubois has since regained the WBO heavyweight title. Usyk still holds the WBA, WBC and IBF belts, but he is technically a unified champion now rather than undisputed.
The 11 Men to Become Undisputed in the Four-Belt Era
Just 11 male boxers have held all four belts at once since 2004. Some held the status briefly. Others did it in multiple divisions.
The Full List in Chronological Order
- Bernard Hopkins: Middleweight, 2004. The original. KO9 win over Oscar De La Hoya.
- Jermain Taylor: Middleweight, 2005. Beat Hopkins by split decision before getting stripped by the IBF weeks later.
- Terence Crawford: Super lightweight 2017, welterweight 2023, super middleweight 2025. The only man in history to do it in three divisions.
- Oleksandr Usyk: Cruiserweight 2018, heavyweight 2024. Won the World Boxing Super Series at 200lbs, then beat Tyson Fury to add the heavyweight version.
- Josh Taylor: Super lightweight, 2021. The Scottish southpaw beat Jose Ramirez to unify all four belts at the O2 Arena in May 2021.
- Canelo Alvarez: Super middleweight, 2021. Beat Caleb Plant by TKO11 to become the first Mexican undisputed champion in the four-belt era.
- Jermell Charlo: Junior middleweight, 2022. KO10 win over Brian Castano in their rematch.
- Devin Haney: Lightweight, 2022. Beat George Kambosos Jr. in Melbourne by unanimous decision aged just 23.
- Naoya Inoue: Bantamweight 2022, super bantamweight 2023. Currently undisputed at 122lbs.
Terence Crawford’s Historic Three-Division Run
Terence Crawford stands alone in modern boxing history. He is the only male boxer ever to become undisputed champion in three different weight classes during the four-belt era. He did it at super lightweight in 2017, welterweight in 2023, and super middleweight in 2025.
His final undisputed win came on 13 September 2025 against Canelo Alvarez at Allegiant Stadium in Las Vegas. Crawford then retired in early 2026, walking away at the absolute peak of his powers.
Only Henry Armstrong, who held undisputed status in three weight classes during the pre-four-belt era of the late 1930s, has matched the feat. Armstrong did it before most modern sanctioning bodies even existed, which makes Crawford’s achievement the modern benchmark.
The Women’s Four-Belt Era
Undisputed status is much more common in women’s boxing. Thirteen women have achieved it in the four-belt era compared to 11 men. The reason is mostly structural.
Women’s boxing has fewer high-profile fighters per division. That makes it easier for the very best to clean out their weight class and unify all four belts. Several women have also done it across multiple divisions.
The Most Notable Female Undisputed Champions
- Claressa Shields: Three-division undisputed champion. The most decorated women’s boxer in history.
- Cecilia Brækhus: Held all four welterweight belts for years and defended them more than any women’s champion before her.
- Katie Taylor: Undisputed at lightweight and super lightweight. Helped headline women’s boxing in the UK and Ireland.
- Amanda Serrano: Featherweight undisputed champion and one of the biggest stars in the sport.
Who Could Be Next to Become Undisputed?
The British Heavyweight Picture
Britain has not produced a four-belt undisputed heavyweight champion. Lennox Lewis came closest in 1999 and 2000, when he held three of the four major belts at heavyweight before the WBO was widely recognised. The current British heavyweight scene is led by Tyson Fury, Anthony Joshua and Daniel Dubois, with rising star Moses Itauma positioned as the WBO mandatory challenger heading into his August 2026 fight with Filip Hrgovic.
Contenders Across the Divisions
Jesse ‘Bam’ Rodriguez at junior bantamweight is the strongest active candidate. He holds three of the four belts at 115lbs and is widely seen as the most likely next undisputed champion if he can navigate the politics.
Other names in the mix include Junto Nakatani at bantamweight (once he recovers from his orbital fracture), David Benavidez at light heavyweight, and Sebastian Fundora at junior middleweight. Each is one or two belts away from joining the undisputed club.
Why Undisputed Status Matters
Becoming undisputed champion changes a fighter’s career. It increases purse demands, boosts pay-per-view marketing and cements a place in boxing history that nobody can dispute.
That is the whole point. In a sport with too many champions and too many belts, undisputed status delivers something boxing rarely has. A single, clear, universally recognised number one in a weight class.
Where to Bet on Undisputed Championship Fights
BetVictor offers boxing odds across all undisputed and unification title fights, from Naoya Inoue’s super bantamweight defences to the biggest heavyweight cards across the calendar. New customers can also check the latest BetVictor sports offers before placing their first wager.
18+. Always gamble responsibly. Please visit BeGambleAware.org for help and support.
