Serena Williams: Main reason tennis star is STILL competing revealed by Boris Becker

SERENA WILLIAMS has her eyes on dominating the tennis record books - and that’s why she’s still going strong at the age of 37.
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Serena Jameka Williams (born September 26, 1981) is an American professional tennis player. The Women's Tennis Association (WTA) has ranked her world No. 1 in singles on six separate occasions. She became the world No. 1 for the first time on July 8, 2002, and achieved this ranking for the sixth time on February 18,... More

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