"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.
In women's singles, top seed Pliskova of the Czech Republic was upset by France's Caroline Garcia in the second round.
With his final stage win, Valter became the overall winner of this year's Tour de Hongrie.
"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.
"My full efforts are totally focused on leading the Badminton World Federation and fulfilling my role as IOC member. I would like to thank the badminton and sporting community for their ongoing support and I look forward to leading the BWF as we plan for our safe return to international badminton," he said.
In the second minute after kick-off, Rondon scored the opener with his left foot. Rondon extended the lead for Dalian in the 29th minute, as he assisted Marek Hamsik to slot home.
Asked whether he would be willing to return to England in the future, Bale replied, "If those options arise, it is something I'd look at for sure."
"It's top players, so if you wait for the mistake it's never going to happen," Garcia said. "If you let Pliskova breeze and take your serve, you're never going to make a return, and then it's 6-4, 6-4 and you're done in one hour."
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
The match ended in a goalless draw, despite Botafogo's 17 shots on goal to Coritiba's seven.
"In the end it got too dark to go for 6.15 meters and I felt it was unsafe to continue any further," said the world silver medalist. "I felt I was in the zone. But you have to be prudent."