Kim, a 32-year-old native of South Korea, filled in on late notice to replace Australia's Sam Goodman, a mandatory challenger who twice pulled out of scheduled bouts against Inoue over the past two months due to a cut suffered in sparring.

Naoya Inoue managed to earn a devastating knockout finish against Ye Joon Kim on Friday, January 24. Inoue was originally set to face Sam Goodman, who was force

Undisputed world junior featherweight champion Naoya Inoue stormed to a predictable fourth-round knockout win over late replacement opponent Ye-Joon Kim on Friday, to set up a fight in the United States next.

Follow along for round-by-round updates as Naoya Inoue puts his undisputed crown on the line against Ye Joon Kim.

Naoya Inoue continued his rule over the super bantamweight division after he knocked out Ye Joon Kim to retain his undisputed title . For Inoue, this fight confirmed that he is still one of the world's best pound-for-pound fighters, albeit against a last minute replacement opponent.

Naoya Inoue's barrage in the fourth round sends Ye Joon Kim to the canvas as the Japanese fighter retains his belts.

Japan's unbeaten Naoya Inoue said he was mentally "exhausted" after knocking out a goading Kim Ye-joon to retain his undisputed world super-bantamweight titles in Tokyo on Friday night. Inoue is expected to take his prodigious skills to Las Vegas for his next fight,

Naoya Inoue managed to earn a devastating knockout finish against Ye Joon Kim on Friday, January 24. Inoue was originally set to face Sam Goodman, who was forced to pull out. Kim stepped in on short notice to take on one of the scariest tasks in boxing,