A 32 year-old male presents to the Emergency Department after he felt a “pop” in his posterior-medial calf while playing tennis. He was able to ambulate but had pain with plantar flexion and was unable to continue playing tennis. What is your differential diagnosis? What physical exam maneuver would you perform? What findings would you expect on physical exam? What is the diagnosis based on ultrasound images? What is your management in the emergency department?