A total of 32 teams, 16 from West Asia and 16 from East Asia, competed in the 2011 AFC Champions League group stage.
The draw for the group stage was held in Kuala Lumpur, Malaysia on 7 December 2010.
[2] In each group, teams played each other home-and-away in a round-robin format.
[3] The winners and runners-up of each group advanced to the knockout stage.
[4] The clubs are ranked according to points and tie breakers are in following order:[4]