Aaron Mooy scored as the Chinese Super League returned to action after four months of inactivity with a championship-deciding mini-league.
The Australian struck the third goal in Shanghai Port’s 3-1 defeat of Shenzen after being set up by former Chelsea midfielder Oscar.
The Brazilian, one of the few high-profile foreign players to have remained in China despite the ongoing COVID-19 pandemic and the associated travel restrictions, also scored himself, curling home a 25-yard free kick.
Monday’s matches marked the return of action for the top teams in the CSL after a long suspension to allow the national team to prepare for Asia’s World Cup preliminaries.
The top four teams from each of two qualifying groups are playing off in a single round-robin competition in Guangzhou to determine the winners of the 2021 title.
Eight-time champions Guangzhou FC, playing in their first game since Zheng Zhi replaced Fabio Cannavaro as coach, slipped to a 1-0 loss against Slaven Bilic-led Beijing Guoan.
Guangzhou were without all of their overseas-born players for the game as financial issues affecting owners Evergrande, the embattled property developer, continue to impact the club.
Shandong Taishan handed Hebei FC a 5-0 thrashing while Brazilian duo Erik and Junior Negrao earned Changchun Yatai a 2-0 win over Guangzhou City.