Dillian Whyte defeated Dereck Chisora for a second time after knocking out his fellow Brit in the 11th round of their heavyweight clash at the O2 Arena.
The two domestic rivals had produced a classic battle back in December 2016, Whyte prevailing on the scorecards after coming out on the right end of a split-decision verdict in Manchester.
There was no need for the judges in the rematch, however, with Chisora laid out by a left hook that negated the need for referee Marcus McDonnell to even bother issuing a count.
The beaten fighter required medical attention while down on the canvas but was able to get back to his feet before being receiving further treatment in his corner.
Defeat will hurt more than the left hook for Chisora, who had played his part in another enthralling battle between the two big men, often setting the pace as he barrelled forward in the hope of catching his foe.
Whyte capitalised on an opening to land a short, sharp left that landed flush on Chisora's chin, allowing the 30-year-old to settle the rivalry in style with an 18th knockout in 26 bouts.
The eye-catching triumph leaves the former British champion well positioned for a shot at WBC holder Deontay Wilder in 2019, while he was also quick to call out former foe Anthony Joshua, who holds the IBF, WBA, IBO and WBO belts and was working at ringside for broadcasters Sky Sports, in the aftermath.
The latest damaging defeat of an already tough career, and the time it took for the 34-year-old Chisora to regain consciousness, suggested he should consider retirement, but when asked if he, would he responded: “F*** that s***, man.
“Every time everybody sees failure they think everybody should retire; that’s a disease we have in Great Britain. You just keep going. You go and go until you can’t take no more.
“I’ll bounce back. There’s fights out there. It’s not like I had a terrible loss or it was a c****y fight. It was a great fight and I enjoyed it.
“Getting hit on the chin you’re just going to end up on the floor. (I’m not going to hospital), I’m perfect, I feel good.”