If Flamengo's secondary samples prove positive, the players will be isolated for 14 days before being tested again, according to CONMEBOL guidelines.
Qingdao went one player down eight minutes after the break as Yin Yaji collected his second yellow card.
In Sunday's game, Pirlo started new arrivals Dejan Kulusevski and Weston McKennie, with talisman Cristiano Ronaldo leading the attacking line.
Wolfsburg made a powerful start on home soil and caused a lot of trouble on the left wing. It took the hosts only 16 minutes to break the deadlock when Renato Steffen flicked on Admir Mehmedi's pinpoint corner, allowing Guilavogui to nod home the opener from close range.
The road so far has been far from easy, especially given the difficulties created by the global COVID-19 pandemic, which "brought an extra load and challenges" for the organizers, who spared no effort delivering on their promise of a 'green, inclusive, open and clean' Games.
Monday's match also saw Guangzhou R&F edge Dalian Pro 1-0 by Ye Chugui's late goal in the 92nd minute. The three points also helped R&F join the chase for fourth place in Dalian.
"We have two more matches to play in the first phase. We will try our best to rank first in our division," said Wang Shenchao. Enditem
Players of Shanghai SIPG celebrate scoring during the 12th round match between Shanghai SIPG and Shijiazhuang Ever Bright at the postponed 2020 season Chinese Football Association Super League (CSL) Suzhou Division in Suzhou, east China's Jiangsu Province, Sept. 22, 2020. Shanghai SIPG won 1-0. (Xinhua/Ji Chunpeng)
The Guangzhou side leads the table with 31 points with the win, while Henan Jianye languish at second from the bottom with six points. Enditem
Chengdu was the only side who had pocketed three wins consecutively in the first three rounds of the league.
Both Kinyamal and Rotich boast personal bests of 1:43.12 and 1:42.54 respectively in the 800m.