Amanda Serrano equalled the record for the most knockouts in women’s boxing history with a second-round stoppage of Cheyenne Hanson in Texas to retain her WBA and WBO featherweight titles.

The American dominated the encounter and, having pinned Germany’s Hanson, 28, in the corner, unloaded a flurry of unanswered punches that lead to the fight being waved off in El Paso, Texas.

The 37-year-old, who now has 32 wins by knockout – tying with women’s boxing pioneer Christy Martin – was the first fighter to stop Hanson inside the distance.

In the co-main event, former UFC star Holly Holm was again narrowly defeated by Stephanie Han to miss out on claiming the WBA lightweight title.

One judge scored it even at 95-95, but the other two saw it 96-94 for the undefeated champion.

Prior to the fight, Holm said she wanted to make a statement and then challenge Taylor in Ireland, but instead it was Han who called for that fight.

“The next fight I want, and I know every fighter wants it, is Katie Taylor,” Han said ringside.

On the undercard, Desley Robinson retained her IBF and WBO middleweight titles by winning a wide unanimous decision against Mary Spencer, while Mexican Lourdes Juarez retained her WBC light-flyweight title with a split decision against Yokasta Valle.

Elsewhere, O’Shaquie Foster impressed to beat Raymond Ford by a majority decision to retain his WBC super-featherweight title at the Fertitta Center, Houston.