"More information about your injuries will be known in the coming days.
"His wife Erin flew to Hong Kong to stay with him. He will not be available for tours until further notice."
The Hong Kong Jockey Club said in a statement that Angland was scaled for the knife on Monday but did not specify the type of surgery but it is understood that he has been conscious since the fall.
Angland remained on the track for 10 minutes after the fall on Sunday and was communicating with the medical team before being taken directly to Prince Of Wales Hospital.
It is understood that he was visited by several Australian jockeys who travel in Hong Kong on Sunday night and had a series of tests and exams before the doctors decided on the surgery.
It was listed as being in a serious but stable condition on Monday.
Angland had gone to Hong Kong with a day-to-day ride to help with the ranks of out-of-town jockeys because of suspension and injury.
He set the 994th career winner for John Size in Follow Me at the beginning of Sunday's card and was slightly out of his position as a double in the Chevalier Cup in What Else But You.
He had already ridden in Hong Kong for four years.
Angland was experiencing the best year of his career with 130 winners in 2018, including a fruitful partnership with Trapeze Artist, who delivered group 1 at TJ Smith and All Age Stakes.
He was reaching the pinnacle of his career and is currently the sixth in the premiership of the Sydney jockeys.
In addition to his association with Trapeze Artist Angland, he also won the Spring Champion Stakes and Victoria Derby title at Ace High last year.
He is popular among his peers and several went to social networks on Monday to wish Angland and his family the best.
Race Writer for the Sydney Morning Herald