WBC super bantamweight champion Toshiaki Nishioka stopped Mexican challenger Jhonny Gonzalez in the third round to successfully defend the title for the second time on Saturday.
Nishioka saw his record improve to 34 wins, 21 by way of knockout, against four defeats and three draws.
He became only the second Japanese fighter to defend a title overseas since Jiro Watanabe did so in 1985.
"I did it. I am happy that I was able to get a knockout in front of the Monterrey boxing fans," said Nishioka, adding that he was not really concerned that the title bout took place overseas.
Gonzalez sent Nishioka to the canvas with a right in the first but the champion rallied and got his jab working to precision in the next round before finishing off his opponent.
"I made the mistake of letting my guard down and a punch got through. I have to correct this but I plan to continue going forward," said Gonzalez.