Martina Navratilova is retired from being a tennis player.
Martina Navratilova ( Martina Navrátilová [ ˈmarcɪna ˈnavraːcɪlovaː ] ; born Martina Šubertová [ ˈmarcɪna ˈʃubɛrtovaː ] ; October 18 , 1956 ) is a Czech and American retired tennis player and coach .