Necaxa's night went from bad to worse when midfielder Claudio Baeza was sent off after being shown a second yellow card for a bad challenge on Pedro Aquino with 13 minutes remaining.
Meanwhile, playing in front of empty stands (for the opening months of the campaign at least) once again promises to make a mockery of home advantage and make games much harder to predict.
After the result, Shijiazhuang rank fifth with 13 points, while Qingdao are sixth with seven points among eight sides in the league Suzhou division. Enditem
"We all trained very hard, and I want to thank all the players,"
Developing his squad to a high-speed train might come near a tightrope walk as the German coach knows the challenge.
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.
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."
"In accordance with the Grand Slam rulebook, following his actions of intentionally hitting a ball dangerously or recklessly within the court or hitting a ball with negligent disregard of the consequences, the US Open tournament referee defaulted Novak Djokovic from the 2020 US Open," the statement said.
Elsewhere, Belarus' fifth seed Aryna Sabalenka lost to compatriot Victoria Azarenka 6-1, 6-3, ninth seed Johanna Konta of Britain was stunned by Romania's Sorana Cirstea 2-6, 7-6 (5), 6-4 and tenth seed Garbine Muguruza from Spain lost to Bulgaria's Tsvetana Pironkova 7-5, 6-3.
Third seed and last year's runner-up Daniil Medvedev of Russia and sixth seed Matteo Berrettini of Italy also made it to the third round.
"Our opponents played very well today. We were not decisive enough. In the deciding set, we tried to play our tactical discipline and not be influenced by our rivals. We made it," said Liu.