Claim: Frank Sedgman was a tennis champion.

Francis `` Frank '' Arthur Sedgman , AM -LRB- born 29 October 1927 -RRB- 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 could n't keep the heat on . '' Sedgman is one of only five tennis players all-time to win a multiple slam set in two disciplines , matching Margaret Court , Roy Emerson , Martina Navratilova and Serena Williams . In 1951 he and Ken McGregor won the men 's doubles Grand Slam . Sedgman turned professional in 1953 .