Fractures of the hook of the hamate have rarely been reported. They have usually resulted from blunt trauma or a sharp strike against the hamate hook while swinging a golf club, baseball bat, or tennis racquet. Patients present with acute onset of pain localised over the ulnar aspect of the wrist and reduction in grip strength. In the case reported here, the patient complained of gradual onset of pain on the ulnar aspect of the wrist after altering his grip for serving in tennis. Once the diagnosis was made, the fracture was treated conservatively and the patient made a complete recovery.