RIO DE JANEIRO – The UFC’s ambitious World Tour 2013 wraps up Friday in Rio de Janeiro, but one famous face will be missing from the announced lineup. UFC heavyweight champion Cain Velasquez will not take part in the final stop of the UFC World Tour 2013 after reportedly citing security concerns in Brazil. Combate.com first reported the fighter’s decision, and MMAjunkie.com (www.mmajunkie.com) has since confirmed Velasquez’s withdrawal from several sources close to the event. Velasquez’s camp confirmed the champion will not be traveling to Brazil but said he never intended to, despite UFC announcements to the contrary. “He’s never been scheduled to go,” Heidi Seibert, a rep for Velasquez’s camp, told MMAjunkie.com.