In June 2013, Gassiev defeated 24 year old Levan Jomardashvili (31-10, 21 KOs) to claim the vacant WBC Youth world cruiserweight title at the Yunost Arena in Chelyabinsk. 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. Gassiev had his second fight in November at the Traktor Sport Palace in Chelyabinsk, Russia, defeating Vladimir Chuklin, knocking him out in round 4.
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 made his professional boxing debut at the age of 17 on 21 September 2011. He had a short amateur career, consisting of 25 fights. Gassiev is from Vladikavkaz, the capital of North Ossetia-Alania, and is of Ossetian Iron descent. As of October 2021, he is ranked as the world's ninth-best active heavyweight by BoxRec. Murat Georgievich Gassiev ( Russian: Мурат Георгиевич Гассиев Ossetian: Гасситы Георгийы фырт Мурат born 12 October 1993) is a Russian former unified cruiserweight world champion, having held the IBF title from 2016 to 2018, and the WBA (Unified) title in 2018. Vladikavkaz, North Ossetia-Alania, Russia
