Martina Hingis has announced her retirement on Facebook. The 37-year-old's final tournament will be the WTA Finals in Singapore, where she and Yung-jan Chan are the top seeds. The duo won their ...

NEW YORK -- OK, so Martina Hingis fires around more loose words than loose forehands. She is, in sporting lexicon, cocky. She pouts, she preens, and she pushes the sportsmanship envelope with ...