AFL players Isaac Heeney and Joel Patfull have both been hurt while overseas on holiday.

Sydney young gun Heeney was struck from behind in Hong Kong while trying to get into a taxi.

The 19-year-old suffered a fractured jaw in what the club termed an "unprovoked attack" but is expected to start pre-season training as scheduled.

Greater Western Sydney defender Patfull suffered a broken collarbone in a motorbike accident in Bali.

Patfull was on a surfing holiday with former Brisbane teammate Zac O'Brien when he fell from a bike in Kuta on Saturday night.

The 30-year-old, who played 182 games for the Lions before joining GWS at the end of the 2014 season, was treated at BIMC hospital.

Patfull is making arrangements to fly home, where he will consult a specialist.

"His pre-season training schedule will be determined following further assessment," GWS said in a statement.

AAP