The Bundesliga is also going to intensify its efforts to support football development in China.
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.
Moreno remained in the thick of things and kept Germany's defense busy as the striker hit an effort on target from a promising position in the dying seconds of the first half.
"Serena is Serena," Sakkari said after advancing earlier Saturday by beating 19-year-old American Amanda Anisimova 6-3, 6-1. "You have to come up with some great tennis. Otherwise there is no chance against her."
"I was playing well today," said Thiem. "I had a good plan for the match. He's very dangerous when he can dictate with his forehand. I was trying to avoid that. He also has very, very fast legs. I was trying to play my fastest tennis to keep him on the backhand, to not let him dictate with the forehand. I did that very well today."
The league association is happy about setting up concepts, allowing a certain number of fans to return to stadiums using a day-to-day approach considering infection numbers.
SIPG promptly adjusted tactics to catch up in the second half but were still scoreless, only to see Brazilian forward Marcos Vinicius seal the result with a low drive for China Fortune in stoppage time.
A survey by the organizers finally convinced the IPC. Results showed 90 percent of those surveyed could tell the emblem was for the Paralympic Winter Games without the illustration.
Beijing Guoan's second-place position and Wuhan Zall's third position remain unchanged in Group B. Enditem
"I think the supervisors are just doing their job, but very unlucky for Novak," said Zverev, who reached the quarterfinals by winning on Sunday. "If it would have landed anywhere else, he would have been fine."
"We do not want to speculate on any situation," he said. "Considering the possibility of (further) postponement or cancellation, in case of any discussion, the IOC, Tokyo 2020 and key partners will have to sit together for any possible options at that time."