Jockey William Buick will be sidelined for at least six weeks after being injured in a fall in the United States.
He was unseated as Royal Ascot winner Permian was fatally injured after coming last in the Secretariat Stakes at Arlington on 12 August.
Buick, 29, suffered a compression of his T12 vertebrae and he will be assessed again in six weeks.
"I have plenty of respect for the injury and I realise how lucky I have been," he said.
Buick is one of the leading jockeys in Britain, and a retained rider for Sheikh Mohammed's Godolphin team.
Permian, trained by Mark Johnston, suffered a broken leg and was put down.