World number two Caroline Wozniacki and Wimbledon champion Angelique Kerber eased through their opening matches at the Wuhan Open in China on Tuesday. Australian Open champion Wozniacki, who received a first-round bye, was barely troubled by the 61st-ranked Swede Rebecca Peterson, winning 6-4, 6-1 to set up a third-round clash with Olympic champion Monica Puig, who romped past Aliaksandra Sasnovich 6-2, 6-2.

Peterson offered some resistance in the first set, breaking Wozniacki's serve at 5-2, but faded as the Dane -- who lost her first match at Japan's Pan Pacific Open last week -- quickly regained control as she looks for a good run in Wuhan to secure a return to the WTA Finals, which she won last year. "It's great to get a good start, obviously. Every match counts," Wozniacki said.