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The main event will see current UFC Light Heavyweight Champion Jon Jones facing former champion Vitor Belfort. Originally, Jones was set to defend his title against Dan Henderson at UFC 151 on September 1, 2012 at the Mandalay Bay in Las Vegas, Nevada, USA, but UFC President Dana White announced on August 23 that Henderson had a partial tear in his MCL and would not be able to compete. It was than revealed that Jones declined a fight against Chael Sonnen, who offered to take the fight on eight days notice. As a result, the event was cancelled. This marked the first time the UFC had cancelled an event, with the official fight card having been announced, in the organization’s history.