Daliapour was yesterday reported to be lame in his nearside foreleg following his unplaced effort behind Silvano in Sunday's Audemars Piguet Queen Elizabeth II Cup.
The Ivan Allan-trained horse, who finished sixth in the Group One event, had been at the centre of a minor injury scare four days before the race because of concerns over the same leg but he was eventually given the all-clear.
A Club statement said yesterday: 'The veterinary surgeon, Dr W. H. Chan, has reported that he examined Daliapour and noted the horse was lame in its nearside front leg. Dr Chan has established the lameness was originating from around the nearside knee. He performed an X-ray and this did not reveal any bone damage to the knee. Before being allowed to race again, Daliapour will be required to perform satisfactorily in an official barrier trial and will be subjected to an official veterinary examination.'
Gary Ng Ting-keung's Billion Win, who finished last in the Queen's Silver Jubilee Cup on Sunday, was found to be lame in its nearside hind leg and will have to pass the same tests before being allowed to race again.