2013 AFC Champions League group stage
The group stage of the 2013 AFC Champions League was played from 26 February to 1 May 2013. A total of 32 teams competed in the group stage.
The draw for the group stage was held on 6 December 2012, 16:00 UTC+8, at the AFC House in Kuala Lumpur, Malaysia. The 32 teams were drawn into eight groups of four. Teams from the same association could not be drawn into the same group.
The following 32 teams (16 from West Asia Zone, 16 from East Asia Zone) were entered into the group stage draw, which included the 29 automatic qualifiers and the three qualifying play-off winners, whose identity was not known at the time of the draw:
In the group stage, each group was played on a home-and-away round-robin basis. The winners and runners-up of each group advanced to the round of 16.
The teams are ranked according to points (3 points for a win, 1 point for a tie, 0 points for a loss). If tied on points, tiebreakers are applied in the following order:
The matchdays were 26–27 February, 12–13 March, 2–3 April, 9–10 April, 23–24 April, and 30 April–1 May 2013.
...
Wikipedia