Ryota Murata learned many valuable lessons from the second professional fight of his career on Friday in Tokyo.

The 27-year-old finished Dave Peterson, of the United States, with an eighth-round technical knockout to win in front of the large crowd that gathered at Ryogoku Kokugikan to see the London Olympic middleweight gold medalist.

Because his pro debut was so remarkable (he won via a second-round TKO), many observers expected a similarly overwhelming victory, but Murata's second opponent was a lot tougher to put away.