Brisbane Roar midfielder George Lambadaridis will miss the 2013-14 A-League season after tearing his posterior cruciate ligament in a pre-season friendly.
The 21-year-old has been ruled out for nine months after a collision which saw him stretchered off late in Brisbane's 5-0 win over Albany Creek Excelsior on Tuesday night.
Lambadaridis, who has made five senior appearances for the Roar, is contracted until the end of the 2014/15 campaign.
"George sustained a serious left knee injury against Albany Creek," Roar head physio Tim Oostenbroek said.
"He will be having surgery next week to reconstruct injuries to the posterior cruciate and lateral ligaments."