Frankie Dettori riding Golden Horn celebrate winning The Qatar Prix De L’Arc De Triomphe at Longchamp racecourse in Paris, France. Photo:  Alan Crowhurst/Getty Images

Frankie Dettori is no physical giant at five feet four inches but racing’s most identifiable figure casts such an overwhelming headline-grabbing shad(...)

Thierry Jarnet leads Treve to victory in last year’s Prix de l’Arc de Triomphe at Longchamp  in Paris last year. Photograph: Eric Feferbergeric/AFP/Getty

Her trainer insists should Treve secure an unprecedented hat-trick of Prix de l’Arc de Triomphe victories it will make the French superstar racing’s g(...)

Epsom Derby Winner Golden Horn (left) with trainer John Gosden and second placed Jack Hobb.  Photo:  Paul Harding/PA

Golden Horn has been added to Sunday’s Qatar Prix de l’Arc de Triomphe at Longchamp, with owner Anthony Oppenheimer stumping up the €120,000 fee as ex(...)

Joseph O’Brien: the 22-year-old has had problems with his weight. Photograph:  Alan Crowhurst/Getty Images

Ryan Moore’s injury misfortune could turn into Group 1 opportunity for Joseph O’Brien when the Irishman teams up with Archangel Raphael in Longcham(...)

David Wachman has indicated Legatissimo may sidestep Irish Oaks. Photograph: Lorraine O’Sullivan/Inpho

Legatissimo will try to regain the winning thread in the Qatar Nassau Stakes at Goodwood after narrow defeats in her last two starts. Winner of(...)

Ryan Moore partnered the thrilling Gleneagles to a comfortable victory in the St James’s palace Stakes at Royal Ascot. Photograph: Reuters

Dual Guineas hero Gleneagles turned in a dominant performance in the St James’s Palace Stakes at Royal Ascot. Aidan O’Brien’s three-year-old was a bri(...)

Ryan Moore rides Gleneagles to win The Quipco 2000 Guineas Stakes at Newmarket on May 2nd. Photo: Charlie Crowhurst/Getty Images

Aidan O’Brien quickly overcame a brief flirtation with running Gleneagles in the Derby and that decision will pay off with a vengeance if the dual-Gui(...)

New Bay ridden by Vincent Cheminaud winning the French Derby ahead of Highland Reel. Photograph: Thomas Samson

Aidan O’Brien came up just short of securing a first French Derby success when Highland Reel found New Bay too good at Chantilly on Sunday, but atte(...)

 Vincent Cheminaud riding New Bay to win the French Derby (Prix Du Jockey Club) at Chantilly with Joseph O’Brien on Highland Reel coming home second. Photo:  Alan Crowhurst/Getty Images

Aidan O’Brien’s Highland Reel made up for a poor run in the French 2000 Guineas to take second spot to New Bay in the French Derby at Chantilly. New B(...)

Jockey Ryan Moore who pilots Cape Clear Island in the French Derby with  trainer Aidan O’Brien. Photograph:  Pat Healey/PA Wire

Aidan O’Brien has won the Irish Derby a record 11 times and the Epsom Derby on five occasions, all of which makes the lack of a French Derby on his(...)