Matchday Six: 5 things to look out for

Preview - Group H: Shanghai SIPG FC (CHN) v Ulsan Hyundai FC (KOR)

Preview - Group H: Sydney FC (AUS) v Kawasaki Frontale (JPN)

Preview - Group G: Urawa Red Diamonds (JPN) v Beijing FC (CHN)

Preview - Group G: Jeonbuk Hyundai Motors FC (KOR) v Buriram United (THA)

Preview - Group D: Al Ahli Saudi FC (KSA) v Pakhtakor (UZB)

Preview - Group D: Persepolis FC (IRN) v Al Sadd SC (QAT)