Steffi Graf only plays softball.
The Grand Slam tournaments , also called majors , are the four most-important annual tennis events . Martina Navratilova ( Martina Navrátilová [ ˈmarcɪna ˈnavraːcɪlovaː ] ; born Martina Šubertová [ ˈmarcɪna ˈʃubɛrtovaː ] ; October 18 , 1956 ) is a Czech and American retired tennis player and coach . Steffi Graf . In 1988 , she became the first and only tennis player ( male or female ) to achieve the Golden Slam by winning all four Grand Slam singles titles and the Olympic gold medal in the same calendar year . The Women 's Doubles competition was part of the tennis program at the 1988 Summer Olympics .