Adelaide United have confirmed that Tarek Elrich ruptured his anterior cruciate ligament in an A-League clash with Melbourne City.
The Australia international lasted just 25 minutes of that contest before being forced from the field.
The 30-year-old full-back suffered the injury after landing awkwardly on his left leg.
He is now facing up to a lengthy spell on the sidelines, with Adelaide announcing that the opinion of medical professionals will be sought before a decision is made on any surgery.
Speaking on Elrich's injury, the Club’s doctor, Dr James Ilic, said: “Following scans on Friday evening, we can confirm Tarek has ruptured the ACL in his left knee.
“Tarek will now see a surgeon on Monday to discuss the best course of action and to begin the recovery process as soon as possible.”