The anterior cruciate ligament of the knee (ACL) is the most reconstructed ligament in the human body. Granan et al. gathered data from Denmark, Norway and Sweden as part of the Scandinavian registry. The overall annual incidence of primary ACL reconstructions ranged between 32 and 38 per 100,000 inhabitants. This rose to 71–91 for the target population (15–39). There was a slight predominance of males (57–60 %). The median age at injury was 23–27 and at surgery 25–30, with a median time from injury to surgery of 7–10 months. Soccer, handball and skiing were the top injuring sporting activities (13–50 %). The reconstruction averaged approximately 1 h and was predominantly performed as outpatient surgery (38–79 %). Simultaneous meniscal (35–55 %) and cartilage (17–27 %) lesions were common and led to less favorable outcomes. Meniscectomy was the most frequent procedure for meniscal injuries (69–80 %). Autologus hamstrings were the most used grafts (61–86 %), followed by bone – patellar tendon – bone (14–38 %). All knee injury and osteoarthritis outcome (KOOS) subscales improved up to 2 years postoperatively, with no difference between single and double bundle procedures. The highest increase was seen in function and sports, pledging for an injury of the young and physically active population [1–3].