Anterior cruciate ligament (ACL) is major stabilizing ligament in the knee which may tear with over use of knee for playing sports. The ACL has poor ability to heal and may cause instability. Other common sports injuries in knee are cartilage damage and meniscal tear. Knee injuries of sports may require surgical intervention that can be performed using open surgical or minimally invasive technique. Your surgeon will recommend you for physical therapy to strengthen your muscles, improve elasticity and improve the movements of the bones and joints.