Viktor Postol (28-0, 12 KOs) stopped Lucas Matthysse (37-4, 34 KOs) in the 10th round to claim the vacant WBC light welterweight title on Saturday night at the StubHub Centre in California.
Postol ended the fight with a thumping right that sent Matthysse crashing to the canvas, where he remained until he was counted out.
Matthysse started strongly, landing a number of hard punches. But as soon as the Ukrainian started connecting with his jab, he took control of the action and was successfully landing punches to the head and body.
The Argentine had his moments and occasionally landed right hands, but as the fight progressed, he was becoming more erratic and failing to connect with any real power.
Postol continued to take charge and land his shots in the later rounds. It was a thunderous right hand that ended the fight at 2:58 of the 10th.
After the bout, Postol gave credit to his coach Freddie Roach for his knockout victory.
“The punch felt natural to me because we practice it over and over at Wild Card,” said Postol. “I started boxing when I was 12 years old in a gym outside of Kiev. My ultimate goal was to win a world championship even when I was a little boy.
“I made a decision to come to America, which is the mecca of boxing. This is my third fight with Freddie Roach. I am the world champion because of Freddie and my other trainers at Wild Card.
“They taught me and they gave me strategy. During this fight, they told me what to do. I followed Freddie’s instructions and I threw that last combination to win the fight”
Matthysse, who was hoping for a lucrative clash with Manny Pacquiao before this fight, said: “I felt something pop in my eye. I wanted to take care of my eye. I could’ve gotten up but I stayed down to protect my eye.
“He had his night and I just didn’t have my night. But he is the world champion tonight and I want to congratulate him.”