Sydney jockey Tye Angland is in a Hong Kong hospital and will undergo surgery after a fall at Sha Tin.
Angland came off when Go Beauty Go knuckled over coming out of the barriers in the ninth of 10 races on Sunday.
The Hong Kong Jockey Club said Angland was conscious and responsive when he was taken to hospital for tests but gave no details of his possible injuries.
The multiple Group One-winning jockey spent four years in Hong Kong and was riding on Sunday to help fill a jockey shortage caused by suspensions and injuries.
Sky Sports Racing reporter Andrew Bensley reported Angland was due to undergo surgery and his wife had flown to Hong Kong to be with him.