Nadal, seeded second, lost 6-2, 7-5 to eighth-seeded Schwartzman, who will next play 12th seed Denis Shapovalov of Canada for a spot in the final.
The Rio de Janeiro state championship resumed behind closed doors in June and officials had hoped to reopen stadiums in July but changed their minds as infections soared.
Eight minutes later, things went from bad to worse for Duisburg as Volkmer felled Erling Haaland as the last man to receive his marching orders.
Flamengo had never before lost a Copa Libertadores match by a five-goal margin. Previously, their worst showing in South America's premier club competition was a 5-1 capitulation to Gremio in 1984. Thursday's result was also the heaviest defeat by defending Copa Libertadores champions.
The Israeli club scored the first goal in the 50th minute, with a successful penalty kick by midfielder Dan Biton, after the visitors' captain Syarhey Kislyak pushed Maccabi's Dor Peretz in the penalty area.
"We respect everything that you have decided on. Wherever you are, we will always back you up. Come on!" a netizen named "Fan Fan" wrote on Weibo. Enditem
In men's 5,000m, Duo Bujie became front runner from halfway, but he was overtaken with two laps to go. On the final lap, Peng Jianhua emerged to win with 14:13.78, Qin Zhenfei and Zhao Changhong finished second and third respectively, Duo Bujie missed the podium with the fourth place.
In the day's later fixture, Hellas Verona shared the spoils with Roma in a 0-0 draw, with both sides hitting the woodwork three times. Enditem
The 35-year-old agreed to a contract that runs until the end of the current Serie A season in February, Sport said on Thursday.
The changes mean that the weekend will open with Villarreal at home to Eibar, with Villarreal looking to improve on an opening day's performance that saw them held 1-1 at home by newly promoted Huesca.
"Depending on the future direction about the club's sporting and economic ambition, we could only consider working with partners who definitely have proof a connection to the club's identity," Jobst underlined.