The Ultimate Fighting Championship comes to Mandalay Bay in Las Vegas, where the gladiators are ready for action -- and marquee matches include the interim heavyweight title bout between Tim Sylvia and Antonio Rodrigo Nogueira. Other showdowns include Tyson Griffin against Gleison Tibau, Rob Yundt vs. Ricardo Almeida, Nate Marquardt taking on Jeremy Horn, and Frank Mir battling former professional wrestler Brock Lesnar.