Defending champions Osaka Gamba edged China's Shandong Luneng 1-0 to keep their 100 percent record intact on Wednesday.

Defending champions Osaka Gamba (blue) edged China's Shandong Luneng 1-0 to keep their 100 percent record intact on Wednesday.

Gamba, who had already qualified for the knockout stage from Group F, have won all five of their matches so far while The Chinese Super League champions need a win to reach the last 16.

The loss leaves the Luneng on seven points alongside South Korea's FC Seoul with one match to go in the group.

After a goalless first half, Osaka Gamba came back strongly after the interval. Severino Lucas scored the only goal in the 58th minute.

The top-placed team in each of the eight groups will play at home against one of the second-placed sides in the one-leg round of 16, which will be held in the west zone on May 27 and the east zone on June 24.

(Xinhua News Agency May 7, 2009)