"Our organization regrets the inconvenience that the suspension of the match may cause to the Mexican football federation (Femexfut) and thanks them for their willingness and patience in recent days," read the Fedefutbol statement.
Pellegrini has had a perfect start to life at the club with two wins from two games and with Betis looking a lot harder to score against than last season.
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.
With one round left, Chongqing has booked a berth in the next stage.
Seven minutes later, Caio Lucas added his name to the scoresheet as Sharjah rounded off the scoring.
The 24-time Norway international follows Josep Martinez, Hee-Chan Hwang, Benjamin Henrichs, Lazar Samardzic and Angelino as the sixth new arrival of the summer transfer period.
"We were the better side, that's for sure. We had lots of chances to score several goals in the first half, but it was still tight because Nice also had chances after our first two goals. But Keylor was exceptional," said PSG coach Thomas Tuchel.
Roger Guedes and Graziano Pelle scored in the first half to seal the win, which helped Shandong build an unassailable lead with 23 points in the Dalian group.
Shanghai is scheduled to meet Beijing Guoan in the next round on Friday, and will secure the top spot going into the second phase if it could remain undefeated. Shijiazhuang will fight against Chongqing Lifan on the same day.
The result left Boca with 10 points from four matches in Group H, three points clear of second-placed Caracas FC. Independiente Medellin remained at the foot of the group with four straight defeats.
Five minutes later, Zhu Jianrong nearly contributed another goal for Huanghai in his one-on-one with Teda's goalkeeper. But his volley from small angle missed the target.