Most boxing heavyweight world title fights won by brothers
- Who
- Vitali Klitschko, Wladimir Klitschko
- What
- 30 total number
- Where
- Ukraine
- When
- 02 July 2011
The most boxing heavyweight world title fights won by brothers is 40 by Wladimir and Vitali Klitschko (both Ukraine) from 26 June 1999 to 25 April 2015.
Wladimir has won 25 heavyweight title fights while Vitali has won 15 such bouts in his career. To be eligible for this record, a fight had to have occurred with at least one of boxing's four major sanctioning bodies' title belts on the line: the IBF, WBO, WBC, and WBA.