Coolmore have confirmed that St Nicholas Abbey has suffered a career-ending injury.
The Aidan O'Brien-trained horse was dealt the blow this morning, with Coolmore claiming that they are trying to "save him" for a career at stud.
A statement was released on Twitter saying: "St Nicholas Abbey suffered a serious career ending injury at Ballydoyle this morning, vets are currently attending to him."
St Nicholas Abbey was the favourite for Saturday's King George VI and Queen Elizabeth Stakes at Ascot.