 On Saturday, the European contingent won five races, capped by an upset by English-based Raven's Pass over heavy favorite Curlin in the Classic.Santa Anita racetrack hosted the Breeders' Cup for the fourth time in 2008.It was the first time that the event had been held on a synthetic dirt surface instead of natural dirt, as Santa Anita had changed to a Pro Ride surface in 2007 in response to a state mandate aimed at increasing the safety of the sport for both horses and jockeys.