Serengeti Empress (Alternation) sparkled in a front-running display in the Aug. 8 GI Ballerina S. at Saratoga and will try to make it two straight with a win in Saturday's GI Derby City Distaff S. at Churchill Downs. While the Ballerina's opening fractions of :21.75 and :43.74 would have been enough to incinerate most rivals, they merely served as a stepping stone to victory for the speedy filly as the 2019 Kentucky Oaks heroine finished one length clear of the hard-trying yet second-best Bellafina (Quality Road), who returns to re-oppose...