Tuesday
At Singapore Indoor Stadium
Singapore
Purse: $6.5 million (Tour Championship)
Surface: Hard-Indoor
Round Robin
Group B
Caroline Wozniacki (8), Denmark, def. Maria Sharapova (2), Russia, 7-6 (4), 6-7 (5), 6-2.
Agnieszka Radwanska (6), Poland, def. Petra Kvitova (3), Czech Republic, 6-2, 6-3.
Standings: Wozniacki 1-0 (2-0); Radwanska 1-0 (2-0); Sharapova 0-1 (1-2); Kvitova 0-1 (0-2).