Monday
At Singapore Indoor Stadium
Singapore
Purse: $6.5 million (Tour Championship)
Surface: Hard-Indoor
Round Robin
Group A
Serena Williams (1), United States, def. Ana Ivanovic (7), Serbia, 6-4, 6-4.
Simona Halep (4), Romania, def. Eugenie Bouchard (5), Canada, 6-2, 6-3.