The anterior cruciate ligament (ACL) is one of the more commonly injured knee ligaments. When completely ruptured in active individuals, a reconstruction is often needed for symptoms of giving way. This is a very reliable operation in stabilising the knee when performed well. We reconstruct the ACL using hamstring tendon graft which we harvest from the inner side of the same knee (hamstring ACL reconstruction). The procedure is performed as a day case/single night stay. special rehabilitation programme is necessary after surgery. Patients are allowed to put full weight on the operated leg as soon as possible and we do not routinely brace the knee, but patients are advised to use crutches for 4 weeks post surgery as a precaution.