Whyte maintains his position as the No 1 World Boxing Council challenger, and the final punch will send a signal that Whyte has bad intentions in this heavyweight division.
Browne was administered oxygen in the ring as concern arose for his safety after the 38-year-old landed heavily face first on the canvas.
They had indulged in a phoney war, a quiet, cagey start in the opening round, but towards thew end of the first stanza Browne was cut over the left eye. Whyte won the round, and from the second period, simply took over.
Whyte landed powerful left hooks and body shots in a display which made clear his improving skill set, Browne looking every bit of his 38-years. By the third round, Browne’s face was a bloody mask, Whyte exploiting his superior hand speed, growing in confidence as the rounds played out, all to the tune of the younger man.
By the fifth, the tough Australian was fighting with what appeared to be a broken nose, his mouth hanging open as Whyte threw his heavy artillery. Browne showed no quit, and fought back gamely, but the Londoner continued to exert his dominance, ending the contest with a left hook from hell which knocked him clean out.
It was his first defeat in his twenty-sixth contest. Whyte moved to 23 wins, his solitary defeat to Anthony Joshua, the world champion, against whom the Londoner is desperate to fight again.
"This was the most important in the division outside of the world heavyweight championships,” said Matchroom Sport boxing promoter Eddie Hearn.
“There are two fights I want Dillian to have: against Anthony Joshua and WBC champion Deontay Wilder.'
Earlier, Callum Johnson, after eighteen months out of the sport, claimed the British light heavyweight crown with a dramatic first round knockout of champion Frank Buglioni, dedicating the victory to his father who passed away last year.
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