Djokovic will face Jan-Lennard Struff for a spot in the round of 16. The German needed one hour and 40 minutes to move past American Michael Mmoh 6-2, 6-2, 7-5.
At Rio de Janeiro's Olympic stadium, former Chelsea forward Salomon Kalou made his debut for Botafogo but could not inspire the hosts to victory over Coritiba.
"COVID-19 brought us lot of challenges, which were highlighted in the copyright negotiations. We are regretful to announce the termination with Premier League despite rounds of negotiations," read a statement.
"So you have to make her in trouble. That's what I like and it was a great challenge for me today. I did well in this challenge and I can take the happiness for it, and now I'm after another one."
Caboclo added that national women's team manager Pia Sundhage was informed of the decision in March.
"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.
World number one Djokovic struck 51 winners to notch up the win against Edmund, extending his unbeaten run this year to 25 matches.
The match ended in a goalless draw, despite Botafogo's 17 shots on goal to Coritiba's seven.
"Kyle played a fantastic first set," added Djokovic. "He didn't do much wrong, he served very well and was aggressive from the back of the court. Usually his forehand is a weapon, but his backhand, especially in the first set, was very strong, very solid."
American rider Quinn Simmons took silver and bronze went to Damien Howson from Australia. Enditem
"I feel now is an appropriate time to make this news public," Larsen said in a statement." Medical science has come a long way in dealing with Parkinson's disease, and I feel very little impact of the disease in all areas of my day-to-day life."