Constitution River powered clear in Saturday’s Coral-Eclipse at Sandown to give Aidan O’Brien a 10th win in the Group 1 and confirm himself as one of the defining three-year-olds of the Flat season.
Ryan Moore settled the 8-11 favourite before asking him to go and win the race turning for home, and the response was decisive. Constitution River moved away to score by three lengths from A Boy Named Susie, with Hawk Mountain back in third.
The result matters because it was not just another Ballydoyle Group 1. Constitution River had already won the Prix du Jockey Club, and this first major test against older horses at Sandown sharpened the sense that O’Brien may now have the season’s most flexible middle-distance colt.
York And Ascot Options Stay Open
O’Brien kept the next move deliberately open after the race, with Constitution River holding entries over a range of distances. The Juddmonte International at York, the King George VI and Queen Elizabeth Stakes, the Sussex Stakes, the Irish Champion Stakes and the Prix de l’Arc de Triomphe all remain live routes.
Moore’s post-race assessment only raised the ceiling further, with Racing Post reporting that the jockey felt the colt had enough class to go wherever connections choose.
For O’Brien, a fourth straight Eclipse and 10th overall underlines the depth of Ballydoyle’s hold on Sandown’s midsummer prize. For Constitution River, the win turns the rest of the campaign into a question of target, not talent.




