A 25-year-old man had a fall during a football match where his right leg was trapped under his body. He had pain over the ankle and especially proximally in the leg. Inspection revealed a prominent fibular head (Fig. 1). Stability testing of the right knee showed no instability and the peroneal nerve was intact. X-rays (of both legs/knees) showed an anterolateral dislocation in the proximal tibiofibular joint (Fig. 2). The dislocation was treated with closed reduction under spinal anesthesia. The joint was then stable when tested. He avoided weight bearing for 2 weeks. At 6 months follow-up, the patient played football at the same level as before the injury.