One such case of that mentality back firing was seen on May 7th 2011 when Masao Nakamura, then 12-0 (12) took on Ronald Pontillas in a defence of the OPBF Super Featherweight title.
Up to this point Nakamura had been Nakamura has been taking names, kicking ass and picking up cheques in double quick time. His 12 wins going in to this bout had taken him just 29 combined rounds. He was, in some corners, the Japanese Edwin Valero. When he hit stayed him.
That changed slight when took on Filipino fight Pontillas and was dropped within the first minute. Pontillas, smelling blood, went back on the offensive and quickly knocked out Nakamura in stunning upset that showed how good Pontillas can be when he's on song. Sadly for Pontillas his reign as OPBF champion came to an end in just his second defence and since then he has lived up to his nickname of "Unpredictable" with no real consistency to his results.
Since this loss Nakamura has rebuilt his career excellently with 6 successive stoppages and their is talk about him getting a world title fight with WBA champion Takashi Uchiyama sooner rather than later.
(Video courtesy of Jerome Naldoza)