Four games were contested on Tuesday as the AFC Champions League's Round of 16 continued.
At Oman, Qatar (due to deteriorating relations between Iran and Saudi Arabia):
Abdullah Al Zoari (52') and Carlos Eduardo (57') each scored a second-half goal as Saudi Arabia's Al-Hilal knocked off Iran's Esteghlal Khuzestan 2-1.
At Tehran, Iran:
The opening contest of the series between Persepolis and visiting Lekhwiya ended in a 0-0 stalemate. The match was played behind closed doors due to misbehavior on the part of the Iranian club's fans during Persepolis' May 8 home game against Al-Wahda.
At Nonthaburi, Thailand:
Second-half goals from Kengo Nakamura (66'), Yu Kobayashi (69'), and Hiroyoki Abe (89') carried Kawasaki Frontale to a series-opening 3-1 road win over Muangthong United.
At Guangzhou, China:
Paulinho scored the only goal of the match in the 75th minute as Guangzhou Evergrande defeated visiting Kashima Antlers 1-0 in the opening game of their two-match series.