Sonnen earns his rematch against Silva with grinding win over Bisping at UFC on Fox 2

CHICAGO -- It was a rough 15 minutes, but Chael Sonnen did just enough to get the fight he's coveted for 17 months.

The middleweight title contender locked up a shot against UFC 185-pound champ Anderson Silva with surprisingly tough win over Michael Bisping. In a fight, that appeared to be a toss-up for many, Sonnen took a unanimous decision, 30-27, 29-28 and 29-28, in the co-main event of the UFC on Fox 2 card at the United Center.