The possibility of an all-Williams finale at the WTA
Tour Championships evaporated on Friday when
Serena Williams withdrew prior to her final round robin match citing a stomach muscle injury.
Serena was scheduled to play Russian
Elena Dementieva, and a win would have advanced her into the semifinals. Serena's previous round-robin match was a loss against sister
Venus, winning the first set but them losing 12 of the last 13 games.
Ana Ivanovic also withdrew from the event Friday after battling a virus during the week.
Saturday's semifinals will be
Venus Williams vs.
Jelena Jankovic, and an all-Russian in
Vera Zvonareva vs. Elena Dementieva,
with matches shown live on the Tennis Channel.
