Grand Slam (tennis) ten women have won Career Grand Slams in singles play (rows one and two); among them two men and five women have at least two Career Grand Slams in singles (column three). Since the beginning of the open era, five men (Rod Laver, Andre Agassi, Roger Federer, Rafael Nadal, Novak Djokovic) and six women (Margaret Court, Chris Evert, Martina Navratilova, Steffi Graf, Serena Williams and Maria Sharapova) have achieved this. Several singles players have won three major championships without achieving the Career Grand Slam, grouped by the "missing" Grand Slam tournament: Several doubles players have won three major championships without
Grand Slam (tennis) completion of the Career Grand Slam. The major tournament at which the Career Grand Slam was achieved is indicated in bold. Eight men have won all four grand slam tournaments. Two of the eight men achieved a double career Slam. Originally, the grand slams were held on grass (Australian, Wimbledon, and US Open) and clay (French) and the first four players achieved their grand slams on two surfaces. The US Open changed its surface from grass to clay in 1975 and then to hard court in 1978. The Australian Open changed from grass to hard court in 1988. The last