Francis "Frank" Arthur Sedgman, AM (born 29 October 1927) is a retired former World No. 1 amateur tennis champion. In his 1979 autobiography Jack Kramer, the long-time tennis promoter and great player himself, included Sedgman in his list of the 21 greatest players of all time. Sedgman, Kramer wrote, "was as quick as anybody who ever played the game, but he couldn't keep the heat on." Sedgman is only one of five tennis players all-time to win a multiple slam set in two disciplines, matching Margaret Court, Roy Emerson, Martina Navratilova and Serena Williams.