The other match on Friday saw Shenzhen Jiazhaoye held Shanghai Shenhua to a 0-0 draw.
Coates said the Games will start as planned on July 23 "with or without COVID-19," stressing the Olympics has never been cancelled outside of world wars.
Williams defeated Russia's Margarita Gasparyan 6-2, 6-4 while Kenin needed an hour and 22 minutes to maneuver past Canadian youngster Leylah Fernandez 6-4, 6-3.
Liu was victorious in the 2019 Women's World Cup, defeating 2017 winner Zhu in last year's final.
"This victory is very important to me - I've worked so hard to get this win," said the 27-year-old Kazakh.
"Oscar had a little leg discomfort during halftime break and the coaching group made some adjustment to protect him. We all know that he is the core of our team and his absence will certainly have an impact on our attack," said Shanghai defender Wang Shenchao, adding that the team will reflect on the failure and improve in the following games. Enditem
Pepe has made 99 appearances for Gremio and scored 21 goals since making his professional debut in 2017.
Before the game, Dalian ranked seventh with six points in the eight-team division, while Henan, also on six points, sat at the bottom by virtue of their inferior goal difference.
Despite foreseeable setbacks, Loew is going to stick to his plan, Kroos underlined. The German intends to give space for promising youngsters such as the new Chelsea arrivals Kai Havertz and Timo Werner.
There was no shower on site, and people were asked to leave the scene as soon as possible after reaching the finish line.
Hunan Hualai ranks third after sweeping Jiangsu Weikeduo 5-0 on Tuesday, with their opponents remaining at the bottom with no wins.