Premise: 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 . Navratilova was World No. 1 for a total of 332 weeks in singles , and a record 237 weeks in doubles , making her the only player in history to have held the top spot in both singles and doubles for over 200 weeks . 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