Li Na eyes spot in semifinals
ISTANBUL -- Top-ranked Serena Williams advanced to the semifinals of the WTA Championships by sweeping Petra Kvitova 6-2, 6-3 Thursday.
Williams, the defending champion, won all three matches in her group without dropping a set. She's bidding for her fourth title in the eight-women, season-ending tournament.
Earlier, Li Na outlasted Jelena Jankovic 6-3, 2-6, 6-3 for her second victory and eight-seeded Angelique Kerber upset No. 3 Agnieszka Radwanska 6-2, 6-2 to remain in contention ...
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