Singapore: In the other match in the red group, Simona Halep easily defeated fellow debutante Eugenie Bouchard 6-2, 6-3. Both players started nervously but, while Halep quickly settled into her rhythm, 20-year-old Bouchard was error-prone throughout.
It was sweet revenge for French Open runner-up Halep after she lost to Bouchard in the Wimbledon semi-finals.
The first matches in the white group take place on Tuesday, with Maria Sharapova facing Caroline Wozniacki and Petra Kvitova taking on Agnieszka Radwanska.
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