Gennady Gennadyevich Golovkin (Cyrillic: Геннадий Геннадьевич Головкин; born 8 April 1982), often known by his nickname "GGG" or "Triple G", is a Kazakhstani professional boxer. He is a former unified middleweight world champion, having held the WBA (Super), WBC, IBF titles between 2010 and 2018, as well as being the #1 pound for pound fighter in the world between September 2017-September 2018 by The Ring magazine. As of August 2019, he is ranked as the world's second best active middleweight by The Ring, the Transnational Boxing Rankings Board (TBRB), and BoxRec. He is also ranked as the world's third best active boxer, pound for pound, by BoxRec; sixth by the TBRB; and seventh by The Ring.
Golovkin won his first major world championship, the WBA interim middleweight title, by defeating Milton Núñez in 2010. The WBA elevated him to Regular champion status in the same year. In 2014, Golovkin was elevated to the status of WBA (Super) champion and successfully defended both his titles against Daniel Geale. Later that year he defeated Marco Antonio Rubio to win WBC interim middleweight title, and defeated David Lemieux for the IBF middleweight title in 2015. After Canelo Álvarez vacated his WBC middleweight title in 2016, Golovkin was elevated to full champion and held three of the four major world titles in boxing until being stripped by the IBF in 2018 for not fighting Serhiy Derevianchenko.
A calculating pressure fighter, Golovkin is known for his exceptionally powerful and precise punching, balance, and methodical movement inside the ring. With a streak of 23 knockouts that spanned from 2008 to 2017, he holds the highest knockout-to-win ratio – 89.7% – in middleweight championship history, as well as the longest active unified championship reign, with five consecutive defenses, meanwhile ending twelve 6+ winning streaks of his opponents and stopping 4 previously undefeated boxers. In 2016, he achieved his 17th title defense by knockout, which equaled the record set by Wilfredo Gómez in 1982. Golovkin is also said to have one of the most durable chins in boxing history, having never been knocked down or knocked out in a total of 391 fights, 41 as a professional and 350 as an amateur.
In his amateur career, Golovkin won a gold medal in the middleweight division at the 2003 World Championships. He went on to represent Kazakhstan at the 2004 Summer Olympics, winning a middleweight silver medal.