Aidan O’Brien horse crowned champion juvenile

US Navy Flag has been crowned the leading juvenile of 2017 following the publication of the Longines World’s Best Racehorse rankings.

US Navy Flag has been crowned the leading juvenile of 2017 following the publication of the Longines World’s Best Racehorse rankings.

The Aidan O’Brien-trained colt won both the Middle Park and Dewhurst Stakes at Newmarket in the autumn and earned a rating of 122, despite finishing down the field in the Breeders’ Cup Juvenile on his final start of the year.