I am trying to find the world's longest boxing match (most number of rounds). So far no luck.
The longest boxing match (with gloves) in history was 110 rounds long.
It began around 9 p.m. on April 6, 1893 and ended the next day well after 4 a.m. Andy Bowen and Jack Burke fought for seven hours and 19 minutes in New Orleans, La. before the match was eventually deemed "no contest" when the fighters were too exhausted to continue. That decision was later changed to a "draw."
Check out our Boxing Through The Years section for more great boxing history.