It's the most anticipated rematch in UFC history. In their first fight, Chael Sonnen nearly made history, coming tantalizingly close to being the first UFC fighter to beat middleweight champion Anderson Silva.
Sonnen showed no fear, coming forward with reckless abandon and taking the fight to Silva, beating him to the punch and taking him to the mat with ease. In the end, a triangle choke rescued the champion from near-certain defeat.
That was two years ago. Ancient history as the MMA world turns. Will Sonnen have as easy a time with Silva in a rematch? I'll break the fighters down in five key categories to see who might have the advantage going into Saturday's big bout.