Wallabies full-back Israel Folau requires ankle surgery and is expected to be out for three months, the Australian Rugby Union (ARU) announced on Thursday.
Folau sustained the injury at the Rugby World Cup and scans have confirmed an operation is required, with the Australian star to complete his rehabilitation in Sydney.
The 26-year-old hurt his ankle against host nation England in Pool A action last month but played on, only missing the quarter-final win over Scotland, as the Wallabies lost to reigning champions New Zealand in the decider.
He is now in a race against time to be ready for the start of the NSW Waratah's 2016 Super Rugby campaign, which gets underway on February 27.
Folau has earned 38 caps for the Wallabies since debuting in 2013, while he helped the Waratahs to the Super Rugby title last year.