Reigning champion Barty said there were two reasons for her decision to skip the clay-court tournament, which is scheduled to take place in Paris from September 27 to October 11.
Things nearly got a lot worse for Zall before going off at half-time, when the ever-lively Zhang broke free once again, but this time his shot was well saved by the goalpost.
There were also third round wins for Belgian star Elise Mertens, Belarussian veteran Victoria Azarenka and France's Alize Cornet.
"A second test will be carried out within 72 hours and then another every five days as long as they remain in the tournament," he added.
Sunday's stage 9 will continue to be held in the Pyrenees as it follows a 153km route from Pau to Laruns before a rest on Monday. Enditem
China Fortune struggled to cope with the intensity but were 1-0 up in the 45th minute following midfielder Wang Qiuming snapping up the rebound into the net after Brazilian Paulinho's attempt hit the post.
QUITO, Sept. 7 (Xinhua) -- Ecuador head coach Gustavo Alfaro said Monday he feels obliged to guide Ecuador to the 2022 FIFA World Cup in Qatar, despite the team's recent run of mediocre form.
"They feel that what is happening with the U.S. Government could create a negative precedent internationally that could be replicated and would jeopardize the entire global anti-doping system."
Though it was clear that Djokovic had not intended to hit the line judge, organizers nevertheless said the Serbian was disqualified in accordance with the rules.
Spain responded with a big chance at the other end of the pitch as a misplaced return pass from Emre Can to goalkeeper Kevin Trapp allowed Rodrigo Moreno to intercept the loose ball. However, Trapp denied Moreno after blocking the shot in the nick of time in the 14th minute.
RIO DE JANEIRO, Sept. 7 (Xinhua) -- Fluminense forward Evanilson is poised to join reigning Portuguese champions Porto after parting ways with the Brazilian club on Monday.