Medvedev will next face fellow American Frances Tiafoe, and Thiem will take on Canada's rising star Felix Auger-Aliassime.
The 2014 World Cup-winning national coach is counting on a new tactical approach as two key factors play a vital role in his plans.
"There's going to be a new Grand Slam champion. That's all I know right now. There's no past Grand Slam champions left in the draw," Zverev said.
"There's no past Grand Slam champions left in the draw," said fifth seed Alexander Zverev from Germany, who made light work of Spain's Alejandro Davidovich 6-2, 6-2, 6-1 in another fourth round match.
Wang's coach Zhu Zhigen, who is also in charge of the Zhejiang team, acknowledged that the COVID-19 outbreak was mentally challenging for athletes.
The group testing sessions will include some advance-notice testing, where the main focus will be on building the profiles of athletes for the Athlete Biological Passport (ABP) program.
"Ensuring a safe return to international table tennis has been our utmost priority ever since the pandemic broke out. I am delighted that, with the fantastic support and hard work carried out by everyone at the ITTF over several months, we have managed to get events back up and running before the end of 2020," said the ITTF President Thomas Weikert.
"Piatek traveled to Bosnia against our agreement," said Preetz in an interview for Kicker magazine on Sunday evening.
Belarus's Victoria Azarenka advanced into the quarterfinals after rallying past Karolina Muchova of the Czech Republic 5-7, 6-1, 6-4.
With around 50 players testing positive for COVID-19 in Spain during pre-season it seems obvious that some teams are going to be affected again in the coming weeks and months, despite the efforts of the Spanish football league (La Liga).
SIPG remain unbeaten with six wins and two draws before the match. They kept offense flowing and had a point-blank chance on 34 minutes, while captain Hulk blasted a close-range shot that was saved by China Fortune keeper Bao Yaxiong.