Zhang Shuai and Wang Yafan lost in straight sets, while top seed Belinda Bencic continued her climb into the world top 10.
Bencic, the Swiss No 1, defeated Wang Yafan 6-2, 6-2 in one hour and 16 minutes, marking her sixth victory in a row.
"I felt good on the court," Bencic said. "I tried to play aggressively, tried to play my game, and it worked out well.
Author's summary: Bencic progresses in Hong Kong Tennis Open.