Plans for dual Derby winner Harzand are on hold after he returned lame from the Qipco Irish Champion Stakes at Leopardstown.
The Dermot Weld-trained colt was sent off the 2-1 favourite in a glittering field but had to settle for eighth of the 12 runners behind French star Almanzor.
Speaking at the Curragh on Sunday, Weld said a decision on whether he will take his chance in the Prix de l'Arc de Triomphe would have to wait.
The Rosewell House handler said: "I've not had time to review the race yet, but he was badly chopped early on. He's very sore this morning and lame.
"His right hind leg is badly bruised, and it was a brave performance considering what happened.
"We will have to see how he is before making any decision on the Arc."
Harzand has lit up the mile-and-a-half three-year-old division this season, winning the Investec Derby at Epsom in June before following up in the Dubai Duty Free-sponsored equivalent at the Curragh.