"But I don't think we played confidently enough in today and yesterday's matches. I think we can do better as the championship moves on," Zhang added.
The last CSL victory for Shenhua came in the middle of August with a 1-0 win over Jiangsu Suning, followed by two defeats and five draws.
Mexico had been due to face Costa Rica on the same day, but the Central American team withdrew on Tuesday because their players faced a two-week quarantine upon returning home.
With the win, Esteghlal edged Al Shorta on goal difference to finish second behind Al Ahli, who were confirmed group winners before the match. Enditem
The win was a relief for the German coach and the struggling defending champions as they have scored only one goal in the opening three games, which was the worst record for the capital club since the 1984-1985 season.
Peru will meet Paraguay in Asuncion on October 8 and Brazil in Lima five days later.
The organizers also highlighted that reviews will take place after each test event, which would help formulate better working and contingency plans amid the pandemic.
Chongqing broke the deadlock in the 13th minute with a stunning goal from Brazilian forward Cirino to make it 1-0 in the first half.
The competition calendar will be confirmed, with the first proposal including 228 competition sessions across 19 matchdays. Based on the current plan, mixed doubles curling will be the first event two days before the opening ceremony while the women's 30km cross-country skiing wraps up the matches in the afternoon of the closing day.
The club has invited city residents and local businesses to have a say on the proposals which have already won widespread approval from fans.
As a result, the team decided to go on strike to express its solidarity with Szalai, who is highly respected among fans and staff.