Sydney rising star nominee Isaac Heeney has suffered a broken jaw in unprovoked attack in Hong Kong.

Heeney was attempting to get into a taxi when he was struck from behind.

The club released a statement on Sunday.

โ€œThe Sydney Swans are aware Isaac Heeney was involved in an unprovoked attack while in Hong Kong with teammates on Saturday morning,โ€ the club said.

โ€œAfter being taken to the closest medical facility, it was detected that Heeney had suffered a fractured jaw in the attack."

The 19-year-old will return home to Sydney for treatment.