Quorto has suffered a setback and will miss the 2,000 Guineas at Newmarket in May.
The son of Dubawi was last seen winning the Group 1 National Stakes at the Curragh last September during an undefeated juvenile campaign.
Trainer Charlie Appleby said, "Unfortunately Quorto has suffered a soft tissue injury in training in Dubai which will mean he will have to miss the 2,000 Guineas.
"It's a real shame as we had high hopes for him this year. We'll know more when he's scanned for a second time in a couple of weeks."
He added: "It's too early to say when he could be back in action but we've been here before with these injuries and we'll see how he recovers."
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