Also on Thursday, former Italian international Eder scored the winner to help Jiangsu Suning beat Shangdong Luneng 1-0.
Flamengo netted twice in quick succession after the restart: first with a stunning first-time effort from playmaker Everton Ribeiro and then with a cool Arrascaeta finish after a counterattack.
"It was anybody's game really for a set and a half. I made some breaks and then obviously after winning the second set I felt more comfortable. I was returning better, I started to read his serve better, and I was pleased with my serve. Overall, it was a very good test, and I am happy to get through," said Djokovic, who is bidding to capture his fourth US Open trophy and 18th Grand Slam title.
In the 65th minute, Dalian's Ke Zhao added a goal of his own and sealed the 4-0 victory.
He doubled Flamengo's lead with a low shot that rebounded in off the post before Rodriguinho pegged a goal back for the hosts.
With the result, Spain and Germany share the spoils and second place in Group 4. The Spaniards clash with frontrunners Ukraine while Switzerland face Germany on Sunday. Enditem
The 54-year-old Dane announced he has been receiving medical treatment for the condition after being diagnosed some years ago and, with the assistance of doctors, has continued to carry out his duties as BWF president "without limitation," said the world governing body.
A lonely Lutsenko sprinted to the finish and had to wait 55 seconds before the second rider Herrada appeared.
Despite the Bavarians having dominated the national and international stage, close competition is secured as domestic competitors such as RB Leipzig, Borussia Monchengladbach, Bayer Leverkusen and Borussia Dortmund have caught up over recent years.
PP Sports released a statement on Thursday night, claiming the termination was just a "strategic adjustment".
The reasons seem apparent in Klein's view.