US filly Lady Aurelia sprinted to a stunning seven-length triumph under Frankie Dettori in the Queen Mary Stakes on the second day of the Royal Ascot Festival.

The 2-1 chance, trained by Wesley Ward, stormed to victory from the front, with Al Johrar second.

Dettori called her “breathtaking” after she left her rivals trailing in the five-furlong contest.

“I was going some very good splits and when we got to the furlong and a half I asked her to go and she found another gear,” Dettori said. “I was completely shocked. She was a rocket and she relaxed so well. Wesley Ward is a genius.”

Ward said Lady Aurelia is too good to send back home at this point in her career. “We will probably keep her based over here,” he said. “It all depends on where her next start will be but that hopefully will be the Molecomb (at the Qatar Goodwood Festival) and then onto the Prix Morny. I just need to see if the owners agree … I’d like to space her races out. There is nothing in the United States on the grass for a filly like her at the moment.”

Lady Aurelia was bred by Stonestreet Thoroughbred Holdings and is owned by a partnership including Stonestreet Stables.

Dettori enjoyed more success in the final race of the day, riding 11-4 favourite Persuasive to victory in the Sandringham Stakes.

Meanwhile, Sheikh Mohammed’s Godolphin team celebrated a treble with winners trained in three different countries.

Usherette, trained in France by Andre Fabre, won the Duke of Cambridge Stakes after Ribchester landed the Jersey Stakes for North Yorkshire-based Richard Fahey and Portage took the Royal Hunt Cup for Irish trainer Michael Halford.

In the Prince of Wales’s Stakes, jockey Yutaka Take took the much vaunted A Shin Hikari to the front and did his best to keep the five-year-old  in control of the race. But when the running started turning for home, A Shin Hikari lacked zip.

Found, winner of last year’s Breeders’ Cup Turf over Golden Horn, came to the lead a furlong out and just failed to hold off My Dream Boat, who was running well out in the middle of the course for jockey Adam Kirby, who rode his second winner at this year’s festival.

Wednesday’s results

14.30 The Jersey Stakes (Group 3) 7f – Ribchester 7-1

15.05 The Queen Mary Stakes (Group 2) 5f – Lady Aurelia 2-1 fav

15.40 The Duke of Cambridge Stakes (Group 2) 1m – Usherette 9-4 fav

16.20 The Prince of Wales’s Stakes (Group 1) 1 ¼m – My Dream Boat 16-1

17.00 The Royal Hunt Cup (Heritage Handicap) 1m – Portage 10-1

17.35 The Sandringham Stakes (Listed) (Handicap) – Persuasive 11-4 fav

-Extracts from BBC Sport.