IBF welterweight champion Devon Alexander posted a dominant seven-round technical knockout of overmatched Briton Lee Purdy on saturday.
Alexander's title was not on the line after Purdy failed to make the 147-pound weight limit on Friday, but the champion improved to 25-1 with 14 knockouts despite hurting his left hand early.
In another non-title bout on the same card, Lucas Matthysse was even more impressive in stopping IBF light welterweight champion Lamont Peterson, knocking down the American three times en route to a third-round TKO.
Matthysse sent Peterson down once in the second time in the round with a left hook.
Matthysse improved to 34-1 with 32 wins inside the distance and is now expected to face unbeaten WBA and WBCIlight welterweight champion Danny Garcia later this year, with that winner likely facing Amir Khan next.
"nowI know i'm the best at 140 pounds because nobody had ever dominated Peterson the way I did today," Matthysse said.
Peterson fell to 31-2-1 with 16 knockouts. He kept his title, but admitted he was well-beaten.
"He won the fight fair and square," Peterson said. "I have no complaints"
Alexander didn't deliver the same kind of fireworks that Matthysse provided.
He improved to 25-1 with 14 knockouts, but the southpaw said hurting his left hand meant he was unable to unleash some of his fiercest punches.
" I hit him on top of the head and hurt my hand. I had to get that out of my mind. I had a fight to win," he said
He was still able to punish Purdy leaving him bloody and battered before Purdy's corner stepped in over the objections of their fighting and asked the referee to stop the fight after the seventh round.