A 47-year-old female tennis professional is informed by her physician that she has a rotator cuff injury that will require surgery. Her physician explains that over the years of play a shoulder ligament has gradually caused severe damage to the underlying muscle. To which of the following ligaments is the physician most likely referring?
Acromioclavicular ligament Coracohumeral ligament Glenohumeral ligament Coracoacromial ligament