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 19 boxers to hold all four titles simultaneously.
Holly Rene Holm Kirkpatrick is an American mixed martial artist. She currently competes in the women’s Bantamweight division of the Ultimate Fighting Championship(UFC), where she is a former Women's Bantamweight Champion. As of September 17, 2024, she is #8 in the UFC women's bantamweight rankings
Cecilia Carmen Linda Brækhus is a 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.
Amanda Serrano is a Puerto Rican professional boxer, mixed martial artist and professional wrestler. 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.
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.
Myriam Lamare is a French female boxer who won world titles in the World Boxing Association (WBA), World Boxing Federation (WBF), and International Boxing Federation (IBF).
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.
Alejandra Marina Oliveras, known as "La Locomotora", is an Argentine boxer. She is the former WBC female super lightweight, WBO World female featherweight and WBA World female lightweight champion.
Christina Hammer is a German boxer. As a professional, she has held multiple world championships in two weight classes, including the WBO female middleweight title from 2010 to 2019, becoming the youngest boxer to win a WBO world title; the WBC female middleweight title between 2016 and 2018; and the WBO female super-middleweight title in 2013. She also challenged once for the WBO female light-middleweight title in 2014 and once for the undisputed female middleweight championship against Claressa Shields in 2019.
Jessica Balogun is a German professional boxer. She was a standout amateur and is now a world champion professional boxer.
Jessica McCaskill is a former American 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.
Maïva Hamadouche is a French professional boxer and police officer who held the IBF female super-featherweight title from November 2016 to November 2021. At regional level, she held the French female lightweight title in 2014 and the European female lightweight title in 2015.
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.
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.
Christian Adriana Namús Corrales is a Uruguayan professional boxer who held the IBF female junior middleweight title from 2017 to 2018. She also challenged for the WBC interim female light welterweight title in 2009; the WBO female light-welterweight title twice in 2011 and 2012; and the undisputed female welterweight title in 2016. As of September 2020, she is ranked as the world's fifth best active female junior middleweight by The Ring and BoxRec.
Cindy Serrano is a Puerto Rican 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.
Ornella Domini is a Swiss professional boxer who is a two-time European female welterweight champion. She also challenged for the WBC female super-welterweight title.
Boxing in the 2020s is a list of notable fights and events in boxing during the decade from the year 2020 to 2029.
