Savannah Marshall brilliantly stopped Lolita Muzeya in the second round of her world title defence after a flurry of stinging shots on Saturday in Newcastle.
Marshall remained undefeated and kept her WBO middleweight championship to stay on course for the dream fight with Claressa Shields which would be the best-ever in women's boxing.
Marshall enhanced her reputation as a genuine KO artist by standing up to her challenger's pressure and responding by beating the fight out of her inside four minutes.
Marshall was forced to withstand an immediate onslaught from Muzeya causing the first round to erupt into a sensational two minutes.
The Zambian visitor landed a punch within seconds and chased Marshall in a frenzy, forcing the champion to first defend herself then fire back with urgency.
By the end of the opener, Marshall had cracked Muzeya with a massive uppercut and several more counter-punches to eventually have the better of the round.
Muzeya's bravery and willpower wouldn't allow her to take a single backwards step and, although Marshall withstood some difficult moments, she exploded with a vicious stoppage.
Marshall broke Muzeya's resistance with a series of unanswered punches, punctuated with a brutal straight right that forced the referee to step in.
Marshall and her arch-rival Shields, the two-division undisputed champion, will return in separate fights on December 11, live on Sky Sports, before they meet in the ring next year.
Sky Sports Boxing schedule
October 24 - Top Rank in Atlanta
Jamel Herring vs Shakur Stevenson - WBO super-featherweight title
October 31 - Top Rank in New York
Jose Zepeda vs Josue Vargas
November 6 - Top Rank in Las Vegas
Mikaela Mayer vs Maiva Hamadouche - IBF and WBO super-featherweight titles
November 6 - BOXXER in Liverpool
November 20 - BOXXER in London
Richard Riakporhe vs Olanrewaju Durodola
Caroline Dubois professional debut
November 20 - Top Rank in Las Vegas
Terence Crawford vs Shawn Porter - WBO welterweight title
December 11 - BOXXER in Birmingham
December 11 - Top Rank in Las Vegas
Vasiliy Lomachenko vs Richard Commey
December 17 - Top Rank in Montreal
Artur Beterbiev vs Marcus Browne - IBF and WBC light-heavyweight titles
December 18 - Top Rank in Glasgow
Josh Taylor vs Jack Catterall - undisputed super-lightweight title