ASCOT, England (AP) Queen Elizabeth II was denied a winner on the final day of Royal Ascot when Dartmouth failed to retain the Hardwicke Stakes, losing out to one of Irish trainer Aidan O'Brien's two victorious horses on Saturday.
Dartmouth won the same race in 2016 for his famous owner by outsprinting Highland Reel, but faded to fourth this time after briefly holding the lead. Idaho - the brother of Highland Reel - came through late for a win for O'Brien at odds of 9-2.
With 11-8 favorite September also winning the Chesham Stakes for O'Brien, the champion trainer from Ireland finished with a meeting-high six victories.
It is the third straight year that O'Brien has been the leading trainer at Royal Ascot, and eighth time in total.
Dartmouth's trainer, Michael Stoute, will have to wait another year to break the late Henry Cecil's record as the most successful trainer at Royal Ascot. Both Stoute and Cecil have 75 career winners.
The queen - a keen follower of horse racing - has attended Royal Ascot every year since 1945, and was cheered into the venue each racing day this week as she entered in the front carriage of the Royal Procession. She has 24 victories as an owner at Royal Ascot, but had none this year.
Ryan Moore missed out aboard Dartmouth but won on September to finish the leading jockey with six victories.
The Tin Man won the day's signature race, the Diamond Jubilee Stakes, but only after a steward's enquiry over potential interference with the horses who placed second and third.