Istanbul, Turkey (Sports Network) - Two-time titlist Serena Williams
improved to 2-0 in round-robin play at the season-ending WTA Championships in
The third-seeded former top-ranked great Williams got past eighth-seeded
former French Open champion Li Na, 7-6 (7-2), 6-3, indoors at Sinan Erdem
Arena. The powerful American smacked six aces in the 1-hour, 50-minute
The 2012 Wimbledon, U.S. Open and Olympic champion Williams captured WTA
Championships titles in 2001 and 2009 and is a two-time runner-up at this
This week's four-player Group A features world No. 1 Australian Open champion
and U.S. Open runner-up Victoria Azarenka, Williams (2-0), Angelique Kerber
(0-1) and Li (0-1), while Group B boasts 2004 champion and 2007 WTA
Championships runner-up Maria Sharapova (1-0), Wimbledon runner-up Agnieszka
Radwanska (1-0), French Open runner-up Sara Errani (0-1) and Sam Stosur, who
replaced last year's Championships winner Petra Kvitova in the field after
Kvitova (0-1) pulled out, citing a viral illness, after losing to Radwanska on
The top-two players in each group will advance to the semifinals and the
winners will square off in the lucrative finale on Sunday.
Azarenka needs only two wins this week to end the year at No. 1.
The winner of this $4.9 million event could collect as much as $1.75 million.
The Sports Network