Two UFC icons who have been out of action for an extended period of time for different reasons will meet in the UFC 183 main event on Jan. 31 in Las Vegas. Former UFC middleweight champion Anderson Silva returns to the Octagon for the first time since dramatically breaking his leg at UFC 168 in December 2013 to take on former Strikeforce welterweight titleholder Nick Diaz who has been voluntarily sidelined since March 2013.
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