Billy Slater's knee injury is likely to sideline the Queensland full-back from the State of Origin decider in Brisbane next month.
Scans have revealed Slater sustained a grade three tear of the posterior cruciate ligament in his left knee during Wednesday night's Origin II, which New South Wales won 16-12 to level the series at 1-1.
Slater won't require surgery but he tweeted he may be sidelined for up to six weeks, which would rule him out of Origin III on July 4th at Lang Park.
Meanwhile, Maroons back rower Corey Parker is hoping to be available for Origin III despite undergoing surgery for an horrific leg gash.
Parker tagged himself with his own studs, a mishap the Brisbane Broncos stalwart says is not "uncommon" amongst NRL players.