Edwin Valero of Venezuela defeated Takehiro Shimada by technical knockout Thursday to retain his WBA super featherweight boxing title.
Valero sent Shimada to the canvas with a right hook at 1 minute, 55 seconds in the seventh round, prompting referee Guillermo Perez Pineda to stop the bout.
Also Hozumi Hasegawa defeated Uruguay's Cristian Faccio by technical knockout to retain his WBC bantamweight title.
Hasegawa, making his sixth title defense, dominated from the start and won with a left hook that sent Faccio to the canvas midway through the second round.