Goetz H. Welsch is associate professor in orthopedic sports medicine and head of the “Athleticum”, the divison of sports medicine of the University Hospital of Hamburg-Eppendorf (UKE), Germany. He is furthermore head of the medical-team of the “Hamburger SV”, a Bundesliga football club. Prof. Welsch is German board certified orthopaedic and trauma surgeon with the speciality of knee surgery, sports medicine and musculoskeletal imaging. His clinical and scientific focus since about 20 years is sports medicine and regenerative cartilage therapy, including advanced diagnostics as well as rehabilitation concepts. Treating professional athletes, he is specialized in the treatment and the rehabilitation (return to competition) of acute and chronic injuries of the lower extremity, mainly the knee, the ankle and muscle injuries. Prof. Welsch studied and worked at the University of Erlangen, the Medical University of Vienna, the New York University and the Harvard Medical School. He is member in different orthopaedic and radiological societies, published more than 100 peer-reviewed papers, 20 book chapters and received national and international grants and awards.