FIRST ROUND: Eight two-legged ties featuring the 16 lowest-ranked teams in Asia. [completed]SECOND ROUND: 15 two-legged ties played on July 23-28, 2011. Winners advance to Round Three. [completed] THIRD ROUND: 20 teams will be drawn into five groups of four teams. Played September 2, 2011 to February 29, 2012. Group winners and runners-up advance to Round Four.