In the Uruguayan capital Montevideo, Penarol kept alive their hopes of progressing to the next stage, with a 3-0 win over Chile's visiting Colo-Colo.
With the victory over Ymer, Djokovic improved his record this season to a stellar 32-1. The only defeat came in a disqualification earlier this month at the US Open, where he hit a ball in frustration which struck the line judge on the neck.
The result leaves Leeds with six points from three games, while Sheffield are still looking for their first point of the season.
Brazil has the world's second-highest COVID-19 death toll behind the United States, with more than 141,000 fatalities. Enditem
MADRID, Sept. 30 (Xinhua) -- FC Barcelona play their second match of the new season on Thursday night when they travel to play Celta Vigo.
In Thursday's only other fixture, Ecuador's Delfin won 3-0 at home to Defensa y Justicia. Enditem
Wang Yuanyuan (L) of Tianjin spikes the ball during the Group A match between Tianjin and Beijing at the 2020 Chinese Women's Volleyball Championship in Jiangmen, South China's Guangdong Province, Sept. 27, 2020. (Xinhua/Qin Lang)
Yan Yuxiang from Shandong took first place in the men's 200m butterfly in 2:00.18, with Tianjin's Wu Guangshuai and Hunan's Wang Kecheng rounding out the top three.
Luo's compatriots Zhao Xintong, Xiao Guodong and Zhou Yuelong all have progressed into the second stage earlier.
Miguel Angel Russo's men are now four points clear at the top of the Group H standings, with one match remaining before the knockout rounds.
Flamengo entered the match with only three regular starters, having reported 16 positive coronavirus cases in their first-team squad last week. Head coach Domenec Torrent was also absent from the touchline at Allianz Parque because of the virus.