"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.
The total number of coronavirus cases in the United States has surpassed 6 million, with national death toll topping 185,000, according to data compiled by Johns Hopkins University.
PP Sports released a statement on Thursday night, claiming the termination was just a "strategic adjustment".
In the 65th minute, Dalian's Ke Zhao added a goal of his own and sealed the 4-0 victory.
English Premier League announces the termination of cooperation with Chinese broadcaster PP Sports.
"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 team was fantastic during the whole race. Today I felt very good, my legs were really good, until the attack I could ride easily. Also, I was very motivated. Many people supported me along the roads, and I want to thank everyone," Valter said after the race.
The announcement was made Thursday at the IFA, Internationale Funkausstellung, the world's leading trade show for consumer electronics and home appliances, in Berlin.
Duplantis tried to challenge Sergei Bubka's 26-year-old outdoor record of 6.14 meters, but failed to continue after one unsuccessful attempt at 6.15 meters as darkness set in.
"His ability to see space, time his movements and read the game will really complement the qualities that we have in midfield and his arrival really strengthens the depth of talent we have in that position," Solskjaer told the club website.
The hosts added their third goal when Daniel Sampaio latched onto Marco Antonio's pass to slot home in stoppage time.