Another interesting returnee is Martin Odegaard, who is back at the club after an excellent loan spell with Real Sociedad, and it will be interesting to see if the youngster finally gets the chance to impress in an attacking midfield role where there is much competition.
Elsewhere, Belgium's Elise Mertens upset second seed Sofia Kenin of the United States 6-3, 6-3 to also make the last eight.
There was no shower on site, and people were asked to leave the scene as soon as possible after reaching the finish line.
Williams said: "I tried to stay calm and be more serene after the loss of the first set. I knew it was important for me just to keep trying, just to keep going."
"I think lots of people didn't think it was possible to throw a javelin more than 95 meters in a closed stadium. I did it and I think there is a lot space for improvement. Very small differences, tiny differences, can make a difference of many meters."
The remainder of the match was controversial after Gao Lin was shown his fourth yellow card of the season in the 71st minute after complaining to the referee. The Chinese international is set to miss Shenzhen's next match against his former club Guangzhou Evergrande next Wednesday.
The women's one-hour race saw a close battle between Hassan and Kenya's world marathon record-holder Brigid Kosgei. The duo stayed well ahead of the world record pace as they exchanged the lead several times but neither managed to break clear.
A newly-promoted side in the Chinese division two league, Chang'an Athletic finished the 2019 season in 9th place on the 16-team table.
"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."
Former two-time Olympic canoeing champion Meng Guanliang, who called on the public to live a green and healthy life at the closing ceremony, said he was "very excited" to be part of such an event.
Patrick Bezerra equalized eight minutes later with a header following Thiago Galhardo's cross.