Szalai was placed on an individual training program but refused to stay away from team training, and joined practise sessions of the club's under-23 team.
League leaders Saint-Etienne wasted a two-goal lead and missed out on a fourth straight win after drawing 2-2 at Nantes.
The meeting also reiterated that all Games venues should be completed by the end of this year, safely and up to high standards.
Maccabi, without nine players who tested positive for the coronavirus, surprised its opponent in the 9th minute, when midfielder Dan Biton scored, after a long pass from forward Eylon Almog.
The 21-year-old has only made four league appearances for Barca and hasn't taken part in any of the club's three pre-season friendly matches, highlighting that he is not in the plans of new Barca coach Ronald Koeman.
Both sides struggled to create clear scoring opportunities, but as the match seemed to head for a draw, a low drive from Quintana put Chengdu ahead in stoppage time.
"It's really a tough and close match," said spiker Zhang.
After the restart, Esteghlal were quick to cement their place in the Round of 16 with a third goal, as Karimi supplied a chipped cross from the edge of the penalty area for Cheick Diabate, who guided his header past Al Owais to make it 3-0.
The goalkeeper protected his side from a bigger defeat after neutralizing the chances from Angelino and substitute Christopher Nkunku in the closing stages.
"I was trying to find my rhythm and enhancing my cooperation with my teammates in today's match because I have long been out of formal games this year," said Tianjin captain Li.
The CONMEBOL zone qualifiers had been scheduled to begin in late March but were suspended amid the COVID-19 pandemic. Enditem