The Asian Football Confederation has confirmed a revised eastern zone Champions’ League group and playoff schedule after three Australian clubs “Sydney, Melbourne City and Brisbane Roar” pulled out from the 2021 AFC Champions League.

Kenyan Michael Olunga, striker of Al Duhail, maintained the top scorer in the 2021 AFC Champions League, after raising his score to 9 goals in the first six matches. Olunga succeeded in scoring the goal of Al Duhail during the match he lost to the Iraqi police 1-2 in the fifth round, to boost his score after he scored a goal in the first match against the police, a goal in the second round against Al Ahly of Saudi Arabia, and three goals in the fourth round against Iranian Esteghlal, then two goals in the fourth round in front of Esteghlal as well. Olunga is ahead in the scorers' ranking by four goals, ahead of Syrian Omar Al Somah, the Saudi Al Ahly player, and Cheick Diabate, the striker of Iranian Esteghlal.

The Asian Football Confederation’s (AFC)has decided to officially announce the use of video assisted referee system technology (VAR), will be implemented for the second straight season from the Quarter-final stage of the 2021 AFC Champions League and in the AFC Cup Final for the first time.AFC has applied for the second time the technology since the same role in the previous version that was held in Doha in the assembly system, whether for the West or the East Asia.