Boxing is a combat sport and martial art in which two people fight using their fists. Boxing is typically supervised by a referee engaged in during a series of one- to three-minute intervals called rounds, and boxers generally of similar weight. There are three ways to win; if the opponent is knocked out and unable to get up before the referee counts to ten seconds (a Knockout, or KO) or if the opponent is deemed too injured to continue (a Technical Knockout, or TKO). If there is no stoppage of the fight before an agreed number of rounds, a winner is determined either by the referee's decision or by judges' scorecards.

In ancient Rome, there were two forms of boxing both coming from Etruscan boxing. The athletic form of boxing remained popular throughout the Roman world. The other form of boxing was gladiatorial. Fighters were usually criminals and slaves who hoped to become champions and gain their freedom; however, free men, women, and even aristocrats also fought. Gladiators wore lead "cestae" over their knuckles and heavy leather straps on their forearms to protect against blows..