Valter, 22, broke free during the final few kilometers and the peloton was unable to catch him.
In the 65th minute, Dalian's Ke Zhao added a goal of his own and sealed the 4-0 victory.
"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.
He doubled Flamengo's lead with a low shot that rebounded in off the post before Rodriguinho pegged a goal back for the hosts.
The match ended in a goalless draw, despite Botafogo's 17 shots on goal to Coritiba's seven.
Speaking to Sky Sports while on international duty with Wales, Bale was asked about his future at the La Liga champions.
"I tried to leave last year, but they blocked everything at the last second. It was a project I was excited for but it didn't materialize."
"It's a great motivation for me to want to do well this tournament, but for the most part I feel like I've been in quarantine and practising for so long, so I prefer to play matches," Osaka said.
Garcia now faces No. 28 seed Jennifer Brady of the United States as she looks to reach the round of 16 for the first time. Enditem
With this result, Dalian are sixth in Group A with nine points, while Henan with six points remained in last place. Enditem
"I was really focused each game and each point. Especially against top players, one point can make the difference. So I had to stay very calm and keep going," the world number 50 added.