Bare-knuckle boxing
From Tardis Wiki, the free Doctor Who reference
Bare-knuckle boxing was a form of professional boxing in which opponents wore nothing to cover their knuckles.
Rick Bellamy was a bare-knuckle boxer in London in the 19th century. He was an acquaintance of Strax, and often had fights with him. Strax considered him to be one of the toughest humans he'd ever encountered. (PROSE: Silhouette)