In local setting, if the ACL injury is noted to be partially torn from pre-operative Magnetic Resonance Imaging (MRI), surgeons would try to preserve the remaining stump as much as possible with a single bundle ACL reconstruction performed intra-operatively. In order to make the current study result meaningful and could be generalized in local setting, ACL augmentation is renamed as ACL stump-preserving surgery, which is the common practice in local setting.