Rachel Alexandra became the first filly in 85 years to win the Preakness Stakes in the United States on Saturday.
Ridden by Calvin Borel for trainer Steve Asmussen, she held off Kentucky Derby winner Mine That Bird to win the $1.1m (£725,000) event by a length.
"She's the greatest horse I have ever been on in my life," said Borel, who rode Mine That Bird to the Derby triumph two weeks ago.
"When you look in that filly's eyes, it's unbelievable."
