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In page Billie Jean King:

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King played 51 Grand Slam singles events from 1959 through 1983, reaching at least the semi-finals in 27 and at least the quarterfinals in 40 of her attempts. King was the runner-up in six Grand Slam singles events. An indicator of her mental toughness in Grand Slam singles tournaments was her 11–2 career record in deuce third sets, i.e., third sets that were tied 5–5 before being resolved.[citation needed]