Lucas Matthysse remains on course for a world title clash with Danny Garcia after a ruthless first round knockout of Mike Dallas Jr.
The Argentinian ended the fight in explosive fashion as a short right hand sent Dallas face-first onto the canvas at the Hard Rock Hotel in Las Vegas.
Referee Robert Byrd quickly waved it off while the American lay motionless and Matthysse has now set his sights on his big-name rivals at light-welterweight, with Garcia his top target.
Garcia conquered Amir Khan last year to add the WBA title to his WBC belt and Matthysse could be next in line if the champion defeats Zab Judah on 9 February.
Reflecting on the fight, Matthysse said: "I was so relaxed. I was waiting for my opportunity to land a shot.
"I was waiting for him to throw his left, then he ducked and I connected with the right.
"I want Danny Garcia and all the top fighters at 140 (pounds). I hope he doesn't avoid me."
Matthysse suffered a controversial split decision defeat to Judah in 2010 and he is happy to face the American again if he pulls off an upset victory.
"Zab Judah has a great chance to win. This is boxing and anything can happen," he said.