"It's good that I managed to win in three sets and with a day off and just a three-setter to play, I'm feeling good," said last year's runner-up Medvedev.
However, seven of the players tested positive for COVID-19 a few days after their arrival in camp.
"I personally feel like it's an obligation to qualify," the 58-year-old Argentinian told reporters. "I play to win and I don't take losing particularly well."
Also on Sunday, Wales edged Bulgaria 1-0 to top the second-tier Group B4, while Ireland lost 1-0 at home to Finland.
It was Atletico's fourth win from six matches this campaign and lifted Jorge Sampaoli's side to third in the 20-team standings, four points behind leaders Internacional.
According to Du Zuofeng, deputy director of the Co-Host Cities Department of the organizers, the online activities (launched in July as part of the two-year countdown celebration) which encouraged people to upload their exercising record, was a big hit, engaging 310,000 people nationwide with a total of 21.72 million kilometers covered.
Shanghai-based Oriental Sports Daily doubted the Brazilian player had time to go through any kind of medical quarantine.
BEIJING, Sept. 6 (Xinhua) -- The updated emblem for the Beijing 2022 Paralympic Winter Games was released on Saturday to match the new Paralympic symbol that was refreshed in October 2019.
The result left Corinthians ninth in the 20-team standings with nine points from seven matches, a point ahead of 13th-placed Botafogo.
GUANGZHOU, China, Sept. 9 (Xinhua) -- Four top football academies in China, Guangzhou Evergrande, Guangzhou R&F, Shandong Luneng and Zhejiang Greentown, jointly issued an open letter on Tuesday, condemning some "immoral" agents.
BRATISLAVA, Sept. 8 (Xinhua) -- After losing to traditional rivals the Czech Republic 3-1 on Friday, Slovakia once again failed to win and dropped points after a 1-1 draw in Israel in UEFA Nations League Group B2.