Australia winger Josh Mansour is facing a long spell on the sidelines after suffering an anterior cruciate ligament injury in training on Wednesday.
The Penrith Panthers flyer's participation in the Four Nations was cut short following a collision with team-mate Josh Dugan.
Mansour was helped from the field at the Kangaroos' training base and the 26-year-old was taken for a scan to discover the extent of his knee injury.
The 26-year-old scored two tries in the world champions' demolition of Scotland in the opening game of the Four Nations last Friday, but head coach Mal Meninga has confirmed he will play no further part in the tournament in England.
"It's obviously shattering news for Josh," Meninga said.
"He has been a popular member of the squad and was excellent for us against Scotland last Friday."
Mansour, who suffered a medial ligament injury two years ago, was in line to start against defending champions New Zealand at the Ricoh Arena in Coventry on Saturday following his impressive display against Scotland.