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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.

In the first of the last-16 matches, 2005 winner Shaun Murphy moved into a dominant 6-2 lead over China’s Xiao Guodong.

Murphy scraped through 10-9 against Fan Zhengyi in the first round, calling his match-winning break of 50 in the decider the best break he had ever made at the Crucible after he had trailed 53-17.

But the 43-year-old Englishman found this session to be calmer as he made breaks of 79, 103, 63 and 64 to go 5-0 ahead.

World number nine Xiao took the next two frames, but Murphy ended the session well and took the last with a run of 61 to have a four-frame lead in the first-to-13 match.

That match resumes on Friday at 10:00 BST and Murphy could win it with a session to spare if he wins seven of the eight frames in that session. The third session, if needed, will take place from 19:00.

Northern Ireland’s Mark Allen holds a 5-3 lead against England’s Kyren Wilson, the 2024 champion.

Two-time semi-finalist Allen made breaks of 50 and 78 to race into a 5-0 lead, but Wilson won the last three frames of the session, helped by runs of 75 and 50.

The second session is on Friday from 14:30, before it is played to a finish on Saturday morning.