Two-time Grand Slam winner Kvitova had to bounce back from 1-5 down in the opening set against Canada's teenager Leylah Fernandez to set round-of-16 clash with Zhang.
Next up for Kvitova is Germany's Laura Segemund, who dispatched Spaniard Paula Badosa 7-5, 6-2 to advance. Enditem
Jiangsu were placed second in the group after the third round.
Defending champion Rafael Nadal stormed into the fourth round at the French Open with another straight-sets win, beating Italy's Stefano Travaglia 6-1, 6-4, 6-0 on Friday and recording his 96th victory at Roland Garros.
Falcao, 34, has found his scoring touch for Galatasaray with three goals from the opening three rounds of the Turkish Super Lig.
Real Madrid have not made any signings in a summer when spending is down 65 percent overall in La Liga. Enditem
Bayern stumbled and Hertha seized the chance to restore parity at 2-2 in the 72nd, after Cunha danced through the host's defence before beating goalkeeper Manuel Neuer into the top right corner.
Mainz failed to put up any resistance while Union relentlessly tripled their lead after Marvin Friedrich headed home Christopher Trimmel's free-kick in the 63rd minute for 3-0.
RIO DE JANEIRO, Oct. 4 (Xinhua) -- Defending champion Flamengo struck three goals in 20 second-half minutes to set up a 3-1 victory over Athletico Paranaense on Sunday, their first Brazilian Serie A win in almost a month.
"We played very well today. It was a lot of fun. I would preferably play another game straight away," Leipzig's Emil Forsberg said.
"This was to say the least, one of my most difficult races. The altitude took a toll on me and it simply took away my breath. I just can't remember much of the race. I am happy to win in such conditions in my personal best time. I just say it was a solid performance and I am happy to wrap up my season with a win. I will take two weeks break before starting my winter preparations," said Awuah.