UFC 52: Couture vs. Liddell 2 was a mixed martial arts event held by the Ultimate Fighting Championship on April 16, 2005, at the MGM Grand Arena in Las Vegas, Nevada. The event was broadcast live on pay-per-view in the United States and Canada, and later released on DVD.

Pride 12: Cold Fury was a mixed martial arts event held by the Pride Fighting Championships. It took place at the Saitama Super Arena in Saitama, Japan on December 9, 2000.