This week, the UFC returns to its home base in Las Vegas. UFC on ESPN 61 takes place at the UFC Apex in Las Vegas, and features a heavyweight rematch between Marcin Tybura and Serghei Spivac . Elsewhere, many other combat sports events are taking place, featuring several familiar names who have competed under the UFC banner. Check out which veterans of the global MMA leader are competingAug. 9-10. Scroll below to see how the UFC veterans fared last week, and see the names and details of this weekend’s competitors