Georges St-Pierre has been the UFC welterweight champion for nearly four years and 11 months. On Saturday night at UFC 158, that epic reign could come to an end at the hands of one of the most controversial figures in the sport, Nick Diaz.
Diaz, a former Strikeforce champion in his own right, has been one of the top fighters in the sport for years, but that doesn't mean that everyone is excited at the prospect of having him as the champion in the world's top mixed martial arts promotion.
In fact, some within the UFC itself might secretly be hoping that St-Pierre retains his belt, thus preventing Diaz from being the new face of the welterweight division.
Why would they care who wins on Saturday night? There are plenty of reasons, but here are the five biggest reasons that the UFC fears Nick Diaz defeating Georges St-Pierre at UFC 158.