Roy Stanley Emerson AC is an Australian former tennis player who won 12 Grand Slam singles titles and 16 Grand Slam doubles titles, for a total of 28 Grand Slam tournament titles. He is the only male player to have completed a career Grand Slam in both singles and doubles, and first of two men to have completed a double career Grand Slam in singles. His 28 major titles are the all-time record for a male player. In 1964, he was ranked world No. 1.