08/12/2010 6:57PM

Del Mar: Brother Derek's half-sis wins debut


Serene Sophia, a half-sister to the multiple stakes winner Brother Derek, won her debut in a six-furlong maiden race in Thursday's third race.

Ridden by Martin Garcia, Serene Sophia ($5.20) rallied wide to win by 1 1-2 lengths over Fit Kitty, finishing in 1:12.07. Fit Kitty led on the rail but was caught in the stretch while racing on the wrong lead through the stretch.

Serene Sophia, a 3-year-old filly by Giant's Causeway, races for trainer Bob Baffert.