On Sept. 10, 1983, Dick Wertheim was struck in the groin by a serve off the racket of Stefan Edberg. Sitting in a folding chair, Wertheim was knocked so hard by the serve that he fell backwards off his chair and slammed his head into the hard court. The contact caused bleeding in his brain and after five days unconscious, he died. It is believed that Wertheim is the only person killed at a tennis match by a tennis ball.