Utah Jazz rookie Raul Lopez needs exploratory surgery so doctors can determine the severity of a damaged ligament in his reconstructed right knee.

The injury is believed to be a partial tear of the anterior cruciate ligament, Utah vice president Kevin O'Connor said Wednesday. Surgery is planned, but O'Connor didn"t know when or where it will be performed.

"We're simply trying to establish the extent of the injury," O'Connor said. "We would need to do an arthroscopic procedure to take a look at it."

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