He sprained his patella tendon, which runs right down the center of the front of your knee. I wouldn't be surprised if he's out for another month. Anything involving the patella when it relates to basketball can be serious. If he were to tear it, the recovery time would be roughly the same as if he had torn is MCL or ACL. So eventhough it's a tendon and not a ligament, the patella is one of the worst tendons to sprain and is involved in just about every lower body movement. Makes it tough to protect.