Serena Williams poses for a portrait during previews for the TEB BNP Paribas WTA Championships in Istanbul, Turkey.  (Julian Finney/Getty Images for WTA)

NGUYEN: Players get jazzed up for WTA Championships

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Serena Williams celebrates match point after defeating Victoria Azarenka to win the women’s singles final match of the 2012 U.S. Open. For Williams, it is her 15th career Grand Slam title. (Clive Brunskill/Getty Images)

PRICE: Serena stays cool in winning 15th Grand Slam title
GRAHAM: Refusing to lose, Serena solidifies her legacy
GALLERY: Best Photos from the U.S. Open | Celebrities

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Venus and Serena Williams show off their unique look during the 1998 U.S. Open. (Mitchell Gerber/Corbis)

GALLERY: U.S. Open Fashion Through The Years | Best Shots of 2012 U.S. Open

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• 1998

Venus and Serena Williams drape themselves in the American flag. On a related note, Happy Memorial Day, the unofficial start of summer. (Gerard Rancinan/SI)

GALLERY: Athletes With the American Flag

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• SI Photo

Venus and Serena Williams meet Ronald and Nancy Reagan in this 1990 photo. (Allsport)

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• Serena Williams
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• 1990