James, 29, has also sparkled in his first two matches in the Premier League following his move from Real Madrid.
If Flamengo's secondary samples prove positive, the players will be isolated for 14 days before being tested again, according to CONMEBOL guidelines.
Eight teenage footballers lost their lives late Saturday last week when their driver lost control and plunged the vehicle into the Offin river located in Ghana's Ashanti region. Enditem
The top four finishers of each group will form a new group, to be based in Suzhou, to fight for the first to eighth position of the season in the second phase, which will be held between October 16-December 12.
Stoppila Sunzu pulled one back for Shijiazhuang shortly after the interval. But Mierzejewski restored Chongqing's two-goal advantage in the 72nd minute and completed his hat-trick with a penalty to seal a 4-1 win.
The world and Olympic 3,000m steeplechase champion Kipruto, who missed the opening leg of Diamond League series in Monaco in August after testing positive for COVID-19, will return to action after shaking off the virus.
Shanghai scored seven points in a row and led at 8-3 in the second set before Jiangsu fought back. After both sides changed leads several times, Zhang made two kills to initiate a 7-0 run helping Jiangsu take the set.
"You just learn how to deal with the situations that you're in. Obviously I've been in immense pressure situations. I've had people on the pitch whistling in the stadium to me."
In Tuesday's match, Guoan were up by three goals before the interval, with goals from Yu Yang, Jonathan Viera and Fernando Lucas Martins.
The China Hub will feature the first Grand Smash, the top tier in professional table tennis.
Arsenal continued their winning start to the season with goals from Alexandre Lacazette and young striker Eddie Nketiah, who scored the winner five minutes from time after Michail Antonio had equalized for West Ham just before the break.