This clinical study therefore, aims to examine if there is any difference in clinical and functional outcome for patients undergoing ACL reconstruction using a hamstring autograft in a group of patients having a fixed length suspensory device used on the femoral side versus a group with an adjustable length one. It will be the first purely clinical prospective randomised study of these type of loops with the assessors of both clinical tests and the KT1000 device blinded as to which type of surgery the patient has undergone.