Taylor, 38, is an Olympic gold medallist and two-weight undisputed champion. Puerto Rican Serrano has won world titles in an astonishing seven divisions.
They earned more than £1m each for the first fight – the first women’s contest to headline at New York’s Madison Square Garden – and will again, deservedly, be rewarded with seven figures.
“This is every fighters dream to get big paydays and I love my sport, I love what I do,” Taylor says as she downplays reports it could be as much as $6.1m (£4.8m).
Serrano, 36, is also hesitant to reveal her purse but feels other female fighters can capitalise on the magnitude and success of her rivalry with Taylor.
“Women’s boxing is getting better and it’s only going to go up from here,” Serrano says. “I just hope their pay cheques get better, just like mine and Katie’s.”
Despite their optimism, there are only a handful of female fighters whose contests generate life-changing money, and their earnings are not reflected on a global scale.
Energy-rich Saudi Arabia is slowly strengthening its stronghold of boxing and paying fighters – some with lesser profiles than Taylor or Serrano – handsomely.
However, although the first world-title fight in Saudi took place in October, female boxing has generally been overlooked by the Kingdom.
