Superstars at Santa Anita

Kentucky Derby winner Mine That Bird. Photo/Benoit Photo

Kentucky Derby champion Mine That Bird and the undefeated mare Zenyatta will be in action tomorrow at Oak Tree's Breeders Cup Challenge Day at Santa Anita.

The Challenge will include four races, three Grade I races and one Grade II race, in which the winner will automatically qualify for a starting spot in the Breeders' Cup World Championships held at Santa Anita on November 6 and 7.

Mine That Bird will tune up for the $5 million Breeders' Cup Classic in the Grade I $350,000 Goodwood Stakes becoming the first Derby winner to race in this event in the same year as winning the Run for the Roses.

Undefeated mare Zenyatta will be the favorite in the Grade I $300,000 Lady's Secret Stakes which should set her up for defending her title in the $2 million Breeders' Cup Ladies Classic or take on Mine That Bird in the Breeders' Cup Classic.

All fans will receive a Breeders' Cup Challenge Day stadium blanket. The first post is at noon and the gates open at 10 am.