St Nicholas Abbey's racing career has come to an end after the horse was seriously injured at Ballydoyle this morning.
The six-year-old trained by Aidan O'Brien, was favourite for the Betfair-backed King George VI and Queen Elizabeth stakes at Ascot on Saturday, after victories in both it's previous races this year.
A statement released by Coolmore Racing Operation posted on it's Twitter feed read: "St Nicholas Abbey suffered a serious career ending injury at Ballydoyle this morning, vets are currently attending to him."
Owners John Magnier, Michael Tabor and Derrick Smith now face an anxious wait to see whether vets can save him for a stud career, with a further update on his condition due later today.
A six-time Group One winner, St Nicholas Abbey has claimed almost £5 million in prize money, with his last of nine victories coming in the Investec Coronation Cup on Derby Day in June.
Cirrus Des Aigles is now favourite for Saturday's meeting at Ascot with a price of around 6-4.
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