Yes, here in the U.S. a cable TV channel has shown a few celebrity boxing matches: Barry Williams (from "The Brady Bunch") vs Danny Bonaduce (from "The Partridge Family"), Paula Jones vs Tina Harding (former Olympic skater - is Tina her first name? I can't recall for sure).
As Kendall noted, bareknuckle matches could be marathons, some going 100-plus rounds. Those weren't necessarily as long as today's 3-minute rounds. In the bareknuckle era a round ended when a fighter was knocked down.

Chanteyranger