Fourth seed Naomi Osaka of Japan booked her place in the third round with a comfortable 6-1, 6-2 win over Italy's Camila Giorgi.
In other matches on Wednesday, Ceara beat local rivals Fortaleza 1-0, Atletico Goianiense drew 1-1 at Fluminense, Corinthians won 2-1 at Goias and Bragantino drew 1-1 at Athletico Paranaense. Enditem
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.
"It was a fantastic evening. The conditions, crowd, competition - it was all fabulous. Sam is a fabulous competitor, and I feel we bring the best out of each other," Duplantis added.
PP Sports released a statement on Thursday night, claiming the termination was just a "strategic adjustment".
THE HAGUE, Sept. 2 (Xinhua) -- Manchester United have signed midfielder Donny van der Beek from Ajax, both clubs announced on Wednesday.
LAUSANNE, Sept. 2 (Xinhua) -- Armand Duplantis from Sweden set a season's best 6.07 meters in the pole vault at the Wanda Diamond League meeting here on Wednesday, securing the highest outdoor pole vault jump for 26 years.
"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."
There were also second round wins for fourth seed Stefanos Tsitsipas of Greece, fifth seed Alexander Zverev of Germany and seventh seed David Goffin of Belgium.
RIO DE JANEIRO, Sept. 2 (Xinhua) -- Uruguay international midfielder Giorgian de Arrascaeta netted a brace as reigning champions Flamengo beat Bahia 5-3 in Brazil's Serie A championship on Wednesday.
The 28-year-old is now 16th in the overall rankings, 16 seconds behind new leader Yates.