Top-ranked Victoria Azarenka and No. 2 Maria Sharapova both advanced to the second round of the China Open on Monday.
Azarenka easily beat Alize Cornet of France 6-1, 6-0, while Sharapova had a harder time knocking off Simona Halep of Romania 7-5, 7-5.
Azarenka is hoping to rebound from last week in Tokyo where she withdrew from the tournament after a bout of dizziness in the third round.
Azarenka has won four times this year, including the Australian Open. Sharapova won her first Grand Slam title in four years at the French Open.
Caroline Wozniacki of Denmark, seeded 10th, also advanced, beating Chanelle Scheepers of South Africa 7-5, 6-7 (8), 6-2. And Lara Arruabarrena-Veinco of Spain defeated Zheng Jie of China 6-2, 6-4.
Other first round winners included Sorana Cirstea of Romania, who downed Sofia Arvidsson of Sweden 6-2, 6-3, and Carla Suarez Navarro of Spain, who beat fourth-seeded Petra Kvitova of the Czech Republic.
In the first round of the men's draw, fourth-seed...