A UFC Heavyweight Title Fight as champion Junior Dos Santos defends against the man he defeated for the gold, Cain Velasquez. Dos Santos has already defended the title once, defeating Frank Mir by TKO back at UFC 146 in May 2012. Velasquez earned his rematch against the UFC Heavyweight Champion when he defeated Antonio Silva at the same event. UFC 155 takes place on December 29th in Las Vegas, Nevada with no venue announced and the aforementioned fighters headlining.