Leading Qipco 2000 Guineas contender Mohaather has met with a setback.
The Marcus Tregoning-trained colt ended last season with victory in the Horris Hill Stakes and returned to Newbury for his reappearance earlier this month, recording an impressive success in the Greenham Stakes.
But Tregonging told Press Association Sport on Friday afternoon: “He was lame on his off-fore after exercise this morning.
“We’re not quite sure where the problem lies, but a decision will be made on his participation some time on Monday.”
Owned by Sheikh Hamdan Al Maktoum, the son of Showcasing has won three of his four starts and was a best-priced 9-1 chance for the Newmarket Classic at the start of the day.
It is 13 years since Tregoning’s Sir Percy finished second in the Guineas before going on to win the Derby.