Gennadiy Gennadyevich Golovkin, often known by his nickname "GGG" or "Triple G", is a Kazakhstani professional boxer. He has held multiple middleweight world championships, and is a two-time former unified champion. He held the World Boxing Association (WBA), World Boxing Council (WBC) and International Boxing Federation (IBF) titles at varying points between 2014 and 2023, and challenged once for the undisputed super middleweight championship in 2022. He is also a former International Boxing Organization (IBO) middleweight champion, having held the title twice between 2011 and 2023.
Daniel Geale is an Australian former professional boxer who competed from 2004 to 2016. He held the unified WBA (Super) and IBF middleweight titles between 2011 and 2013, and the IBO middleweight title from 2007 to 2009. As an amateur boxer, Geale won a welterweight gold medal at the 2002 Commonwealth Games.
Sergiy Vyacheslavovich Derevyanchenko, is a Ukrainian professional boxer who has challenged three times for world middleweight titles; the IBF title in 2018; the IBF and IBO titles in 2019; and the WBC title in 2020. As an amateur, he won the bronze medal at middleweight at the 2007 World Amateur Boxing Championships. As of February 2021, he is ranked as the world's fourth best active middleweight by the Transnational Boxing Rankings Board, eighth by BoxRec and fourth by The Ring magazine.
Daniel Jacobs is an American professional boxer. He is a two-time middleweight world champion, having held the IBF title from 2018 to 2019 and the WBA (Regular) title from 2014 to 2017. Nicknamed the "Miracle Man," Jacobs' career was almost cut short in 2011 due to osteosarcoma, a rare form of bone cancer. He went on to make a full recovery after spending 19 months out of the sport, meanwhile recovering from severe operation-induced injuries generally perceived as crippling.
Billy Joe Saunders is a British professional boxer. He is the first fighter from the Travelling community to win world championships in two weight classes, including the WBO middleweight title from 2015 to 2018 and the WBO super-middleweight title from 2019 to 2021. At regional level he held the European, British, and Commonwealth middleweight titles between 2012 and 2015. Saunders represented Great Britain at the 2008 Olympics as an amateur, reaching the second round of the welterweight bracket. In the same year, he won gold at the EU Championships.
Santos Saúl Álvarez Barragán, commonly known as Canelo, is a Mexican professional boxer. He has held multiple world championships in four weight classes from light middleweight to light heavyweight, including unified titles in three of those weight classes and lineal titles in two. Álvarez is the first and only boxer in history to become undisputed champion at super middleweight, having held the World Boxing Association (WBA), World Boxing Council (WBC) and Ring magazine titles since 2020, and the International Boxing Federation (IBF) and World Boxing Organization (WBO) titles since 2021.
Osumamu Adama is a Ghanaian professional boxer in the middleweight division, and the first middleweight titleholder from Ghana.
Ryōta Murata is a Japanese former professional boxer who competed from 2013 to 2022. He held the WBA (Regular) middleweight title twice between 2017 and 2021, and the WBA (Super) middleweight title from 2021 to 2022. As an amateur, he won a silver medal at the 2011 World Championships, and gold the following year at the 2012 Olympics.
Janibek Alimkhanuly is a Kazakh professional boxer and unified middleweight champion who has held the WBO title since 2022, and the IBF title since October 2023. As an amateur, he won gold medals at the 2013 World Championships, 2013 Asian Championships and 2014 Asian Games. He also represented Kazakhstan at the 2016 Summer Olympics in the middleweight division, losing in the quarter-finals. He won the WBO Interim middleweight title on May 21, 2022, before being elevated to full champion on August 30, 2022, and he then won the IBF title on October 14, 2023.
Jermall Charlo is an American professional boxer. He has held world championships in two weight classes, including the WBC middleweight title since 2019 and previously the IBF light middleweight title from 2015 to 2017. His identical twin brother, Jermell Charlo, is also a professional boxer and unified WBC, WBA (Super) and IBF light middleweight world champion.
Canelo Álvarez vs. Gennady Golovkin, billed as Supremacy, was a professional boxing match contested for the unified WBA (Super), WBC, IBF, IBO, Ring magazine, and lineal middleweight championship. The bout was on September 16, 2017, at T-Mobile Arena on the Las Vegas Strip. It was televised on HBO pay-per-view in the United States, on BoxNation Box Office in the United Kingdom, and on Space in Latin America.
Canelo Álvarez vs. Gennady Golovkin II billed as Final Judgment, was a professional boxing rematch between Canelo Álvarez and Gennady Golovkin which took place at T-Mobile Arena in Paradise, Nevada on September 15, 2018. Alvarez won by majority decision.
Jaime Aarón Munguía Escobedo is a Mexican professional boxer. He held the WBO junior middleweight title from 2018 to 2019. As of June 2022, Munguía is ranked as the world's fourth best active middleweight by BoxRec, The Ring magazine and ESPN, and fifth by the Transnational Boxing Rankings Board. Munguía's knockout-to-win ratio stands at 79%.
Ivan Baranchyk is a Belarusian professional boxer who held the IBF light-welterweight title from 2018 to 2019.
Vergil Ortiz Jr. is an American professional boxer who has held the World Boxing Organization (WBO) International welterweight title since 2021. As an amateur, he was a seven-time national champion and was the winner at the 2013 Junior Olympics. He was named 2019 The Ring magazine Prospect of the Year. Ortiz is known for his exceptional punching power, having scored all of his wins by knockout. As of August 2022, Ortiz Jr is ranked as the world's fifth best welterweight by The Ring magazine, and fourth by BoxRec and the Transnational Boxing Rankings Board (TBRB).
Michał Cieślak is a Polish professional boxer. He has challenged for the WBC cruiserweight title in 2020 and the WBO cruiserweight title in February 2022. As of June 2020, he is ranked as the world's eighth best active cruiserweight by the Transnational Boxing Rankings Board, ninth by BoxRec and tenth by The Ring.
Femke Hermans is a Belgian professional boxer. She is the current IBF and IBO female super welterweight world champion. She held the WBO female super-middleweight title in 2018, becoming the second Belgian woman to hold a major world championship, and also challenged for the WBA female super-middleweight title and unified WBA, WBC, and IBF female middleweight titles in 2018.
Gennady Golovkin vs. Ryōta Murata, billed as Big Drama in Japan, was a middleweight unification professional boxing match contested between IBF and IBO champion, Gennady Golovkin and WBA (Super) champion, Ryōta Murata. The bout took place at Saitama Super Arena, Saitama, Japan on April 9, 2022.
Canelo Álvarez vs. Gennady Golovkin III, billed as The Trilogy, was a professional boxing match contested between undisputed super middleweight champion, Canelo Álvarez, and unified middleweight champion, Gennady Golovkin, with Álvarez's super middleweight titles on the line. The fight took place on September 17, 2022.
Jimmy Kilrain Kelly is a British professional boxer. He held the WBO Inter-Continental light-middleweight title and challenged for the WBO light-middleweight title in 2015.
Abel Mina
Opera i Filharmonia Podlaska, Bialystok, Poland
Omir Rodriguez
Nizar Trimech
Vladyslav Gela
Sasha Yengoyan
Jaime Munguía 
Don Haskins Center, El Paso, Texas, U.S.
Gennady Golovkin 
Edwin Palacios
Ruben Diaz
Alessandro Goddi
Jose Antonio Villalobos
Kassim Ouma 
Patrick Mendy 
Arthur Hermann
Ivica Gogosevic
Ismail Teboev
Dzianas Makar
Janos Lakatos