Inclusion Criteria:  Age 20-35 years old. Patients will be diagnosed as ACL tear by the following:  I. History of knee traumatic event. II. Clinical examination (ant. Drawer test, Lachman test and pivot shift test). III. Radiological evidence of ACL tear by MRI.  Exclusion Criteria:  Other intra or extra articular knee injuries. Previous ACL surgery on the affected knee. Bilateral ACL injuries. Significant Articular surface injury. Medical comorbidities Patients with malalignment (genu varum. Genu valgum and Genu recurvatum) Neuromuscular disorders