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Katie Taylor Irish: Cáit Táilliúir is an Irish professional boxer and former footballer. She is a two-weight world champion and the current undisputed lightweight champion, having held the WBA title since 2017; the IBF title since 2018; and the WBC, WBO, and Ring magazine titles since 2019, as well as having held the WBO junior-welterweight title in 2019. Following her victory over Delfine Persoon in 2019, she became one of only seven boxers in history, female or male, to hold all four major world titles in boxing—WBA, WBC, IBF and WBO—simultaneously, along with Bernard Hopkins (2004–2005), Jermain Taylor (2005), Cecilia Brækhus (2014–), Terence Crawford (2017), Oleksandr Usyk (2018–2019), and Claressa Shields (2019–).