Gamine, under John Velazquez, stalked the pace-setting Serengeti Empress through fast fractions, ran by her at the eighth pole and drew off to a convincing victory in the $1 million Breeders Cup Filly and Mare Sprint.

Serengeti Empress held second by a nose over the late running Bell’s the One.

Gamine’s final time of 1:20.20 for seven furlongs smashed Keeneland’s track record of 1:21.32 for the distance set by Taris in 2014.

The victory was the third Grade 1 of the year for Gamine, who won the Grade 1 Acorn at Belmont and Grade 1 Test at Saratoga versus 3-year-old fillies earlier in the year. She was coming off a third-place finish in the Kentucky Oaks, run at 1 1-8 miles.

Gamine, trained by Bob Baffert for Michael Lund Petersen, also has twice tested positive for overages of medications not permitted to be a horse’s system on race day.

“I’m so proud and happy for this filly what she’s had to endure this poor thing,” winning trainer Bob Baffert said on NBC Sports after the race. “She showed today… she is the best in the land going one turn and she got to prove it today.”

Though Velazquez asked Gamine away from the gate, she was outsprinted for the lead by Serengeti Empress, under Luis Saez, who ran fractions of 21.77 seconds and 44.27 for the quarter.

Velazquez got Gamine outside of Serengeti Empress to the outside down the backside and Serengeti Empress had no response when Velazquez asked Gamine to run.

Gamine, a daughter of Into Mischief, returned $4.20 as the even-money favorite.