This document discusses the case of a 35-year-old man who sustained a Grade 2 sprain of the anterior talofibular ligament in his right ankle while playing basketball. On examination, swelling and discoloration were observed over the anterior and lateral ankle, with increased pain on inversion and plantarflexion tests. Radiographs did not reveal any fractures. The document then provides background information on ankle anatomy, the classification of ankle sprains, signs and symptoms, epidemiology, diagnostic tests, differential diagnoses, conservative and surgical management options, and the evidence for rehabilitation techniques.