Overview:UFC 168: Weidman vs. Silva 2 was a mixed martial arts event held on December 28, 2013, at the MGM Grand Garden Arena in Las Vegas, Nevada. The event was headlined by a UFC Middleweight Championship rematch between current champion Chris Weidman and former champion Anderson Silva. The two previously met at UFC 162, with Weidman winning via KO in the second round and earning the title.