Roy Stanley Emerson (born 3 November 1936) is an Australian former World No. 1 tennis player who won 12 Grand Slam tournament singles titles and 16 Grand Slam tournament men's doubles titles. He is the only male player to have won singles and doubles titles at all four Grand Slam events. His 28 Major titles are an all-time record for a male player. Most of his titles were won in the final years of the period where the Major tournaments were open only to amateur players, just before the start of the open era when professionals were admitted into tennis's most prestigious events. Roy Emerson is the first male player to win each Major title at least twice in his career. In the history of tennis, only Margaret Court achieved this feat before him. He is one of only seven men to win all four Majors in his career (the others are Fred Perry, Don Budge, Rod Laver, Andre Agassi, Roger Federer, and Rafael Nadal). He was the first male player to win 12 Majors (this was surpassed by Pete Sampras (14) and Roger Federer (16)). Tennis critics and former and current tennis players consider Emerson to be one of the greatest tennis players of all time.