Utah Jazz point guard Dante Exum is set to miss the 2016 NBA season after an MRI scan confirmed that he has torn his ACL in his left knee.
Exum suffered the injury while representing the Australian national team in an international friendly against Slovenia on Tuesday.
The 20-year-old was driving to the basket when his left knee buckled. He rose up to take the shot nonetheless, but crumpled to the ground afterwards before being helped off the court.
Exum's injury is a big blow for the Jazz as he was expected to have more of an impact in the upcoming season after making a number of changes to his game over the summer.
Exum was the fifth overall pick in the 2014 NBA Draft and represented the Jazz in all 82 games last season, averaging 4.8 points, 1.6 rebounds and 2.4 assists per game.
"First and foremost, our overriding concern is with Dante and his long-term health," Jazz general manager Dennis Lindsey said in a statement. "We are continuing to work closely with our medical staff, Dante and his representation in order to reach an accurate diagnosis and recommended treatment so that we can provide him with the best possible care.
"We all know how hard he will work to make a full recovery and look forward to his return to play."