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MARTINA NAVRATILOVA, WOMEN'S TENNIS74-straight wins1984 (Lost to Helena
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74-straight wins
1984 (Lost to Helena Sukova)
You know a streak's good when it has a Wikipedia page dedicated to it. Starting at the U.S. Indoor Championships and ending in the semifinals of the Australian Open, Navratilova was unbeatable. Her reign of dominance in women's tennis spanned from the mid-1970s until the late-1980s.(Credit: AP)

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Martina Navratilova

Martina Navratilova won 18 Grand Slam singles titles.

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