Patrick Bezerra equalized eight minutes later with a header following Thiago Galhardo's cross.
Elsewhere, Belgium's Elise Mertens upset second seed Sofia Kenin of the United States 6-3, 6-3 to also make the last eight.
The win puts Kenin into the third round at the US Open for the fourth year in a row. The American has come up short against top players like Maria Sharapova (2017), Karolina Pliskova (2018) and Madison Keys (2019) at this stage in the past.
"In two to three years, this team has to have total stability. Then we can talk about being the big favorite," Loew said.
Williams will take on Bulgaria's Tsvetana Pironkova, who overcame Alize Cornet of France 6-4, 6-7 (5), 6-3 in another round of 16 match.
But it was another nightmare weekend for Ferrari on their home turf. Before Leclerc's accident, his teammate Vettel had become the first retirement of the race, pulling off with brake failure on lap six after having qualified a lowly 17th.
"All the players have to stay in the two hotels booked by organizers without exception."
So, domestically at least, Real Madrid have to be favorites, but after two successive failures in Europe, will they be distracted by the desire to win a 14th Champions League title? Enditem
Aside from a well-oiled defense, the 60-year-old is pinning his hopes on one of Europe's most promising front lines. Bayern Munich's Leroy Sane and Serge Gnabry and Chelsea's new arrival Timo Werner stand for his flying squad.
HANGZHOU, China, Sept. 4 (Xinhua) -- Having been training behind closed doors for half a year, Rio 200m individual medley bronze medalist Wang Shun is itching to return to competition, with his eyes set on this month's National Championships.
WASHINGTON, Sept. 6 (Xinhua) -- Top seed Novak Djokovic of Serbia was disqualified from the US Open on Sunday after a tennis ball he hit in anger struck a female line judge in the neck.