Murat Georgievich Gassiev (Russian: Мурат Георгиевич Гассиев; Ossetian: Гасситы Георгийы фырт Мурат; born 12 October 1993) is a Russian professional boxer from North Ossetia-Alania. He is currently a unified cruiserweight world champion, having held the IBF title since 2016 and the WBA (Unified) title since February 2018. As of February 2018, he is ranked as the world's second best active cruiserweight by The Ring magazine, the Transnational Boxing Rankings Board and ESPN, and third by BoxRec.
Gassiev is from Vladikavkaz, the capital of North Ossetia-Alania, and is of Iron descent. He had a short amateur career, consisting of 25 fights.
Gassiev made his professional boxing debut at the age of 17 on 21 September 2011. He fought at the Manezh in Vladikavkaz, Russia, beating 22-year-old Roman Mirzoev, who only had three professional win-less fights, in a scheduled four-round fight that went the distance, earning a unanimous decision with scores of 40-37, 39-38, and 39-38 in his favour. Gassiev had his second fight in November at the Traktor Sport Palace in Chelyabinsk, Russia, defeating Vladimir Chuklin, knocking him out in round 4. Over the next 18 months, Gassiev remained unbeaten with a record of 11 wins with 7 coming inside the distance at a tender age of 19.