Guangzhou, China – Reigning champion Chanelle Scheepers was an easy second-round winner, while second-seeded Chinese favorite Zheng Jie came up a loser Wednesday at the $220,000 Guangzhou International tennis event.
Zheng succumbed to rising British left-hander Laura Robson 6-3, 6-3 on the hardcourts at Tianhe Sports Centre.
The 18-year-old Robson recently enjoyed a run into fourth round at the U.S. Open, where she sent Kim Clijsters into retirement with a second-round win and followed with an upset of China's Li Na before falling to Samantha Stosur.
The fifth-seeded Scheepers, meanwhile, avoided an upset by handling Serb Bojana Jovanovski 6-4, 6-1 on Day 3.
The South African Scheepers captured her maiden WTA title last year by beating Slovak Magdalena Rybarikova in the Guangzhou finale.
Scheepers' opponent in Thursday's quarterfinals will be fourth-seeded Pole Urszula Radwanska, who took care of Luxembourg's Mandy Minella 6-2, 6-3.
Three other seeds landed in the round of eight, as No. 3 Sorana Cirstea of Romanian defeated Chinese wild card Duan Ying-Ying 6-1, 7-6 (7-0), No. 7 Peng Shuai of China drilled Thai qualifier Nudnida Luangnam 6-2, 6-1, and No. 8 Alize Cornet of France got past Belarusian Olga Govortsova 6-4, retired. Peng was a Guangzhou runner-up in 2008.
Also on Wednesday, Taiwan's Su-Wei Hsieh drubbed lucky-loser compatriot Kai- Chen Chang 6-0, 6-3 and France's Mathilde Johansson outlasted Chinese wild card Zheng Saisai 6-2, 4-6, 7-5.
Thursday's other quarterfinals will pit Cirstea against Cornet, Peng versus Robson, and Hsieh against Johansson.
The 2012 Guangzhou winner will claim a first prize of $37,000.