Roy Emerson, Australian-American tennis player and coach
Roy Stanley Emerson (born 3 November 1936) 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 titles. He is the only male player to have completed a career Grand Slam (winning titles at all four Grand Slam events) in both singles and doubles, and the first of four male players to complete a double career Grand Slam in singles (later followed by Rod Laver, Novak Djokovic, and Rafael Nadal). His 28 major titles are the all-time record for a male player. He was ranked world No. 1 amateur in 1961 by Ned Potter, 1964 by Potter and Lance Tingay, and 1965 by Tingay.Emerson was the first male player to win 12 singles majors. He held that record for 30 years until it was passed by Pete Sampras in 2000. He also held the record of six Australian Open men's singles titles until 2019 when Novak Djokovic won his seventh title. Emerson won five of those titles consecutively (1963–67), a still-standing record. Emerson is one of only five tennis players ever to win multiple slam sets in two disciplines.

Emerson was a member of a record eight Davis Cup–winning teams between 1959 and 1967. Unlike several of his contemporaries, he chose to remain an amateur player and did not turn pro during the pre-Open Era.