Bernard Hopkins was stopped for the first time in his career as he lost his WBC light-heavyweight title to Chad Dawson in bizarre circumstances.
Dawson lifted Hopkins off his feet in the second round, causing the 46-year-old to fall through the ropes and land awkwardly on the ring apron.
Hopkins immediately clutched his left shoulder in pain and was unable to continue, leaving referee Pat Russell to wave off proceedings and bring the bout to an unsatisfactory end.
However, instead of ruling the fight a no contest Russell declared that Dawson had won on a technical knockout and thus was awarded the world title belt.
"It was not a foul. It's a TKO. He could not continue because of an injury. No foul," Russell said of his decision.
But Hopkins was furious with the decision, claiming that he had been set up and that he was willing to carry on fighting.
"He picked me up, both my feet off the ground, and threw me down on my shoulder," he said.
"I told the referee I would continue with one arm, but he stopped the fight. He never told me that if I stopped fighting I'd be disqualified.
"They set me up. Dawson was just in there to rough me up. That was a blatant foul. It should be no contest, not a disqualification."
But Dawson had no sympathy for his injured opponent, who he accused of faking the injury and quitting the bout because he did not want to face him.
"He jumped on me and was pulling me down, so I pushed him off with the shoulder," Dawson said.
"B-Hop disappointed a lot of fans. I was looking forward to a good fight. I trained eight weeks for this.
"Yes, he was faking. This is a fight I wanted for three years, and Bernard obviously didn't want the fight."
"He keeps talking about Philly and being a gangster. He's no gangster. Gangsters don't quit. He's weak. He's a weak physically- and mentally-minded person. He has no power."