Premise: Martina Navratilova ( Martina Navrátilová [ ˈmarcɪna ˈnavraːcɪlovaː ] ; born Martina Šubertová [ ˈmarcɪna ˈʃubɛrtovaː ] ; October 18 , 1956 ) is a Czech and American retired tennis player and coach . Navratilova is one of just three women ever to have accomplished a Career Grand Slam in singles , women 's doubles , and mixed doubles ( called the Grand Slam `` boxed set '' ) , a distinction she shares with Margaret Court and Doris Hart . Navratilova reached 11 consecutive major singles finals , second all-time to Steffi Graf 's 13 , and is the only woman ever to reach 19 consecutive major semi-finals . She was ranked in the world 's top 10 in singles for a record 20 consecutive years ( 1975 -- 1994 ) , a span which included 19 years in the top 5 , 15 years in the top 3 , and 7 years as the world No. 1 ranked singles player .
Hypothesis: Martina Navratilova is a person.
Label: ENTAILMENT