In boxing, the undisputed champion of a weight class is the boxer who simultaneously holds world titles from all major organizations recognized by each other and the International Boxing Hall of Fame. There are currently four major sanctioning bodies: WBA, WBC, WBO, and IBF. There were many undisputed champions before the number of major sanctioning bodies recognizing each other increased to four in 2007, but there have been only 21 boxers to hold all four titles simultaneously.
Katie Taylor is an Irish professional boxer and former footballer. She was the undisputed and lineal world lightweight champion from 2019 to 2024, and has held the undisputed and lineal world super lightweight championship since 2023. Hugely popular in Ireland, she is credited with raising the profile of women's boxing at home and abroad, and is regarded as the outstanding Irish athlete of her generation.
Cecilia Carmen Linda Brækhus is a Colombian-born Norwegian professional boxer and former kickboxer. She reigned as the undisputed female welterweight boxing champion from 2014 to 2020, and is the first woman in any weight class to hold the WBA, WBC, IBF and WBO titles simultaneously. Brækhus is also one of only 11 boxers in history, male or female, to hold all four major world titles simultaneously. She also held the IBO title from 2016 to 2020, and is currently the interim WBC super welterweight champion.
Natasha Jonas is a British professional boxer is a two weight world champion who has held the unified WBC, and WBO female light-middleweight titles since 2022. As an amateur, she won a bronze medal in the light-welterweight division at the 2011 European Championships; bronze in the lightweight division at the 2012 AIBA World Championships; and silver in the light-welterweight division at the 2014 European Championships.
Amanda Serrano is a Puerto Rican professional boxer and mixed martial artist. As a boxer, she is the unified featherweight world champion, having held the WBO title since 2019, IBO title since 2021 and the WBA title since 2023. She held the IBF title between 2022 and 2024. She is the only female, and Puerto Rican, to win world titles in more than four weight classes, and holds the Guinness World Record for the most boxing world championships won in different weight-classes by a female, having held 9 major world titles across seven different weight classes.
Josh Taylor is a Scottish professional boxer. He is a former undisputed light-welterweight champion, having held the International Boxing Federation (IBF) and World Boxing Association (WBA) titles between 2019 and 2022, the World Boxing Council (WBC) title between 2021 and 2022, the World Boxing Organisation (WBO) title between 2021 and 2023 and the Ring magazine title between 2019 and 2023. At regional level, he held the Commonwealth light-welterweight title from 2016 to 2017. As an amateur, he won a lightweight silver medal at the 2010 Commonwealth Games and light-welterweight gold at the 2014 edition.
Delfine Persoon is a Belgian professional boxer. She held the IBF female lightweight title in 2012 and the WBC female lightweight title from 2014 to June 2019, losing the title in a unification fight against Katie Taylor for the undisputed lightweight championship. As of September 2020, she is ranked as the world's best active female super-featherweight by BoxRec, the second best active female lightweight by The Ring, and the second best active female, pound for pound, by BoxRec, fifth by The Ring and seventh by ESPN.
Érica Anabella Farías, known as "La Pantera", is an Argentine professional boxer. She is a two-weight world champion, having held the WBC female lightweight title from 2011 to 2014 and the WBC female super lightweight title from 2014 to 2018. She also challenged once for the undisputed welterweight championship in 2017. As an amateur, she won a silver medal at the 2006 World Championships.
Jessica McCaskill is an American former professional boxer. She is a former world champion in two weight classes, having held the undisputed, IBO and Ring female welterweight titles; the WBC female super-lightweight title and the WBA female super-lightweight title. She also challenged for the WBA lightweight title.
Chantelle Cameron is an English professional boxer. She is a former world champion in two weight classes, including the former undisputed light-welterweight champion, having held the WBC title between 2020 and 2023; the IBF and Ring magazine titles between 2021 and 2023 ; and the WBA and WBO titles between November 2022 and 2023. She previously held the IBO female lightweight title from 2017 to 2019 and light-welterweight title from 2022 to 2023. She has held the interim WBC female super-lightweight title since 20 July 2024.
Viviane Obenauf is a Brazilian former professional boxer who competed from 2014 to 2019. She has challenged three times for world titles; the IBO female lightweight title in 2017; the IBF female super featherweight title in 2018; and the IBO female super featherweight title in 2019.
Anisha Dzombe Basheel is a Malawian professional boxer who has held the Commonwealth female lightweight title since 2018 and the ABU female super-featherweight title since 2017.
Patricia Berghult Svensson is a Swedish professional boxer who is a former WBC and IBO female super-welterweight World champion.
Terence Crawford vs. Julius Indongo was a professional boxing match contested on August 19, 2017, for the undisputed light welterweight championship. The bout took place at the Pinnacle Bank Arena in Lincoln, Nebraska. Crawford defeated Indongo via third-round KO.
Mary Ann McGee is an American professional boxer. She held the IBF female light welterweight title from 2019 to October 2021 and challenged for the WBC female lightweight title in 2013.
Cindy Serrano is a Puerto Rican former professional boxer who held the WBO female featherweight title from 2016 to 2017. She also challenged for the WIBA featherweight title in 2005; the WIBA and WIBF welterweight titles in 2011; and the unified WBA and IBF female lightweight titles in 2018. Her younger sister, Amanda, is also a professional boxer. The pair became the first sisters to hold world titles from major sanctioning bodies at the same time after Cindy captured the WBO title in 2016.
Dennis Hogan is an Irish professional boxer who is a former IBO super-welterweight World champion.
Katie Taylor vs. Amanda Serrano, billed as For History, was a women's lightweight professional boxing match contested between the undisputed world champion Katie Taylor and seven-division world champion Amanda Serrano. The bout was held on April 30, 2022, at Madison Square Garden in New York City, with Taylor's undisputed lightweight titles on the line.
Boxing in the 2020s is a list of notable fights and events in boxing during the decade from the year 2020 to 2029.
