Artur Beterbiev and Dmitry Bivol square off this Saturday in Saudi Arabia for the undisputed light heavyweight titles. Here's all you need to know.

From the time he started boxing as a six-year-old, Dmitry Bivol has drawn inspiration by wondering what it’d be like to be considered the best boxer in the world.

Boxing history will be made on Saturday, Oct. 12, when Artur Beterbiev takes on Dmitry Bivol in a battle for the undisputed light heavyweight championship. For the first time in the four-belt era, two fighters will face off to unify all 175-pound major belts. Beterbiev holds the WBC, WBO and IBF titles, while Bivol holds the WBA title.