Steffi Graf Steffi Graf Stefanie Maria "Steffi" Graf (; born 14 June 1969) is a German former professional tennis player. She was ranked world No. 1 and won 22 Grand Slam singles titles. Her 22 singles titles put her second on the list of major wins in the female competition since the introduction of the Open Era in 1968 and is third all-time behind Margaret Court (24) and Serena Williams (23). In 1988, she became the only tennis player to achieve the Golden Slam by winning all four Grand Slam singles titles and the Olympic gold medal in the same calendar year.
Grand Slam (tennis) three Wimbledon final matches held in one single day. Notes: Another Grand Slam-related accomplishment is winning a "boxed set" of Grand Slam titles – which is at least one of every possible type of major championship available to a player: the singles, doubles, and mixed doubles at all four Grand Slam events of the year. This has never been accomplished within a year or consecutively across two calendar years. The Career Boxed Set refers to winning one of every possible grand slam title (singles, doubles, mixed) over the course of an entire career. No male player has completed this, although