Giovanni Di Giacomo, MD, graduated from University of "La Sapienza", Rome, in 1988 and obtained his specialty degree in Orthopaedics and Traumatology in 1993. Since 1996 he has been Chief of the Shoulder Arthroscopy Department at Concordia Hospital for Special Surgery, Rome. He has been a tournament doctor for the ATP (Association of Tennis Professionals) WTA since 1995 and a trainer in numerous workshops, seminars, and basic and advanced courses on shoulder arthroscopy. Dr. Di Giacomo is a member of the Board of Directors of the Italian Society of Arthroscopy (SIA), a member of the Upper Extremities Committee at ISAKOS, and an International Affiliate Member of American Academy of Orthopaedic Surgeons (AAOS). His research has been published in internationally recognized journals and he is the author of several books, including the Springer publications Shoulder Instability - Alternative Surgical Techniques (2011) and Atlas of Functional Shoulder Anatomy (2008). He is the inventor of the "Wedged Profile Plate" for the Latarjet procedure develop by Arthrex Inc.Todd Ellenbecker is Clinic Director of Physiotherapy Associates Scottsdale Sports Clinic in Scottsdale, AZ, USA and Vice President of Medical Services for the ATP World Tour. He is a certified sports clinical specialist, orthopedic clinical specialist, and strength and conditioning specialist. He is also a certified USPTA tennis teaching professional, and Chairman of the USTA National Sport Science Committee. Dr. Ellenbecker received the Samuel Hardy Educational Merit Award from the International Tennis Hall of Fame in 2008 and the Turner A. Blackburn Hall of Fame/Lifetime Achievement Award from the Sports Physical Therapy Association in 2011. He was Chairman of the APTA's Shoulder Special Interest Group from 1996 to 2002 and serves on the editorial board of the International Journal of Sports Physical Therapy and Sports Health. He has conducted and published research primarily on upper extremity athletes, as well as shoulder and elbow rehabilitation. He is the author or editor/co-editor of a number of books. W. Ben Kibler is Medical Director for the Lexington Clinic Sports Medicine Center in Lexington, KY, USA, and a long-time member of the USTA National Sport Science Committee. He is also a founding member of the Society of Tennis Medicine and Science as well as a fellow, and former vice-president, of the American College of Sports Medicine. He is a team physician for numerous professional teams, colleges, and high schools in the Lexington area. Dr. Kibler has presented and written prolifically on all areas of sports medicine, but specializes in the upper extremity, shoulder pathology, scapula, and biomechanics of tennis. He is known worldwide as an expert in shoulder mechanics and injury. Dr. Kibler attended medical school and completed his residency in Orthopedic Surgery at Vanderbilt University, Nashville, TN and has been affiliated with Lexington Clinic since July 1977.