David Price put in a brave effort but came up short in his heavyweight battle with Derek Chisora at The O2 Arena.
Price (25-7, 20 KOs) had landed some powerful shots on Chisora during the contest, including a huge uppercut that rocked Chisora at the end of round three.
Chisora was able to recover though, and after Price was knocked down in round four, the towel was thrown in by his corner and referee Howard Foster stopped the contest accordingly.
Chisora said: “It was just business, respect to David Price and his family. He buzzed me and caught me with a beautiful uppercut. I recovered and came back and finished the job.”
Price had taken the fight on three weeks’ notice, after Chisora’s original opponent Joseph Parker withdrew from the fight earlier this month.
The event at The O2 Arena on Saturday also saw John O’Donnell take on Abass Baraou for the WBC International super-welterweight title, with Baraou earning a sixth round stoppage win.
Elsewhere this weekend, unbeaten Avril Mathie (4-0-1, 2 KOs) extended her unbeaten record with a dominant unaimous decision victory over Karen Dulin in Philadelphia.