According to ESPN, this fight is generally considered to be one of the biggest upsets in combat-sports history. Holm's most notable win in mixed martial arts (MMA) occurred at UFC 193 on November 15, 2015, in Melbourne, when she captured the bantamweight title and gave Ronda Rousey her first loss in the sport. She is the only fighter to have won a boxing world title and an MMA title. She is ranked by BoxRec as the greatest female professional boxer of all time, pound for pound, to have finished her career at welterweight. She was a multiple-time world champion in boxing, defending her titles 18 times in three weight classes, and a two-time Ring magazine fighter of the year (2005, 2006). She is a former UFC Women's Bantamweight Champion, and a former professional boxer. Holly Holm (born October 17, 1981) is an American mixed martial artist, who competes in the Ultimate Fighting Championship. Blue belt in Brazilian Jiu-Jitsu under Roberto 'Tussa' Alencar