Katie Taylor was in unusually abrasive form in New York on Wednesday after Amanda Serrano continued to cry foul over last year's result.

Fifty years after Caroline Svendsen reportedly became the first woman to earn a boxing licence in the United States, the fight is a sign of progress, said Risa Isard, an assistant professor of sport management at the University of Connecticut and an expert in women's sport.

Tension is already building between Katie Taylor and Amanda Serrano months before their trilogy fight, as the champion dismissed attempts to switch from two to three-minute rounds