Home Taylor, Serrano, Marshall: The top five female fighters of 2021 Katie Taylor has made three defences of her undisputed lightweight crown in 2021 Photo Credit: Mark Robinson/Matchroom Boxing

Katie Taylor has made three defences of her undisputed lightweight crown in 2021 Photo Credit: Mark Robinson/Matchroom Boxing

Savannah Marshall has defended her WBO middleweight title twice this year Photo Credit: Dave Thompson/Matchroom Boxing

Katie Taylor has made three defences of her undisputed lightweight crown in 2021 Photo Credit: Mark Robinson/Matchroom Boxing

Serrano swept past Miriam Gutierrez earlier this month Photo Credit: Amanda Westcott/SHOWTIME

Jessica McCaskill made two defences of her undisputed welterweight crown in 2021 Photo Credit: Ed Mulholland/Matchroom

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