OSAKA, Japan (AP) Alexander Munoz of Venezuela knocked out challenger Eiji Kojima of Japan in the second round Wednesday to retain his WBA world superflyweight title.

Munoz, who entered Wednesday's bout at Osaka Prefectural Gymnasium as the clear favorite, floored Kojima with a powerful right after 2 minutes, 18 seconds of the second round to improve his record of 23-0.

The 23-year-old Munoz captured the superflyweight title by defeating Japan's Celes Kobayashi last March in Japan. It was his first title defense.

Kojima, 25, dropped to a 6-1.

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