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.
Medvedev will next face fellow American Frances Tiafoe, and Thiem will take on Canada's rising star Felix Auger-Aliassime.
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.
Forward Leonardo Bonatini is currently the only other Brazilian in the Wolves squad. Enditem
The Kenyan was the third pacemaker on Sept. 4 at Brussels Diamond League in the One Hour race which saw Dutchwoman Sudan Hassan, the reigning world 1,500 and 10,000m champion, produced a thrilling kick over the final minute to see off Kenyan world marathon record holder Brigid Kosgei and notch up an astonishing 18.930km over the 60 minutes.
Meanwhile United coach Ole Gunnar Solskjaer commented that he was pleased with what the talented playmaker could bring to his team.
Sakkari threatened to repeat her come-from-behind victory over Williams in the Western & Southern Open two weeks ago, but ultimately fell just short.
Other high-profile South Americans playing in the Chinese Super League include Brazilians Oscar (Shanghai SIPG), Hulk (Shanghai SIPG), Renato Augusto (Beijing Guoan) and Paulinho (Guangzhou Evergrande), as well as Venezuela international striker Salomon Rondon (Dalian Pro). Enditem
The home side almost grabbed a winner in the dying seconds, only to see Zahavi's last-ditch effort cannon off the post.
"As for the disqualification, I need to go back within and work on my disappointment and turn this all into a lesson for my growth and evolution as a player and human being."
"I got a slipstream, found a gap and timed my sprint perfectly," he said. "But this is more of a surprise than the last win."