Japan's clubs had a poor opening to the 2018 Asian Champions League on Tuesday, when Kawasaki Frontale and Kashiwa Reysol both tasted defeat in their group stage openers.

J. League champions Frontale stumbled 1-0 at home to China's Shanghai SIPG, while Reysol failed to make an early lead count in a 3-2 defeat at South Korea's Jeonbuk Hyundai Motors.

At Kawasaki's Todoroki Stadium, Brazilian striker Elkeson scored the game's only goal in the 23rd minute of Frontale's Group F opener.