Martina Navratilova ( Czech: Martina Navrátilová [ˈmarcɪna ˈnavraːcɪlovaː] ( listen); née Šubertová [ˈʃubɛrtovaː]; born October 18, 1956) is a Czech–American former professional tennis player. Widely considered among the greatest tennis players of all time, Navratilova won 18 major singles titles, 31 major women’s doubles titles, and 10 major mixed doubles titles, for a combined total of 59 major titles, the most in the Open Era.