The world heavyweight boxing champion Joe Frazier, before his fight with Joe Bugner. (Photo by Evening Standard/Getty Images). 18th June 1973

Hungarian wrestlers fight during the Hungarian wrestling Championship in Budapest November 29, 2014. (Photo by Laszlo Balogh/Reuters)

A reveller participates in a flour fight during the “O Entroido” festival in Laza village, Spain February 27, 2017. (Photo by Miguel Vidal/Reuters)

Two cocks are trained for a fight in a village in Nakhon Sawan province, Thailand January 10, 2017. (Photo by Chaiwat Subprasom/Reuters)

Two sheep fight in a competition in Zhangjiakou, Hebei province, China on August 1, 2017. (Photo by Reuters/China Stringer Network)

Victorious in 129 successive fights, including 40 as a pro, Ray Robinson falls through the ropes of a ring, under the impact of Jake LaMotta's fists on Olympia Stadium, Detroit, Michigan on February 5, 1943. Robinson got back in the ring, but lost the decision in ten rounds. LaMotta pummelled him for the rest of the fight, winning via a unanimous decision, giving Robinson the first defeat of his career.They fought again just 21 days later when Robinson regained his mantle winning in another 10-round fight, Robinson won the close fight by a unanimous decision. LaMotta stated the bout was gifted to Robinson because he would be inducted into the army the next day. (Photo by Bettmann Archive/Getty Images)

Wrestler known as Gio Malkriado (top) fights with a fluorescent tube with wrestler Ciclope during an extreme wrestling fight at a temporary wrestling ring inside a car wash in Tulancingo Hidalgo, Mexico October 8, 2016. When the time comes for the so-called Extreme Star Fight, six wrestlers climb into the ring. Once the fighting begins, anything goes. They bash each other with chairs and long neon lights, causing small explosions and scattering tiny pieces of glass everywhere. (Photo by Carlos Jasso/Reuters)