Chisora vs. Takam, with it's surprise ending.

Takam was winning, he's actually the better fighter. But then Chisora landed a temple shot which stunned Takam, and he went down. When he got back up, he was still not thinking clearly, and was vulnerable to the punch that ended it.

It shows that a puncher always has a punchers' chance, one punch that lands on the temple can change any fight.