Savannah Rose Marshall is a British professional boxer. She has held world championships in two weight classes: the undisputed and Ring magazine female super-middleweight title since 2023; and the World Boxing Organization (WBO) female middleweight title from 2020 to 2022. As an amateur, she became the first British female world champion after securing gold at the 2012 World Championships. She has been nicknamed as the 'Silent Assassin' due to a combination of her shyness and her multiple knockout wins. As of October 2022, she was ranked the world's second best active female middleweight by BoxRec and by The Ring.
Savannah Marshall
Undisputed championship (boxing)
In boxing, the undisputed champion of a weight class is the boxer who simultaneously holds world titles from all recognized major organisations by each other and the International Boxing Hall of Fame. There are currently four major sanctioning bodies: WBA, WBC, IBF and WBO. There were many undisputed champions before the number of major sanctioning bodies recognizing each other increased to four in 2007, but there have only been 19 boxers to hold all four titles simultaneously.
Wladimir Klitschko won the unified championship in 2008 and defended it 14 times
Muhammad Ali defended the unified/undisputed heavyweight championship 10 times; the record was unbeaten for 36 years