Lee Dong-guk's four goals guided Jeonbuk Motors past Cerezo Osaka 6-1 into the Asian Champions League semifinals, where it will play Al Ittihad after it advanced despite a 1-0 loss at FC Seoul on Tuesday.

Mauricio Molina's late goal wasn't enough for Seoul as Saudi Arabian club Al Ittihad advanced from the quarterfinal stage 3-2 on aggregate.

Osaka won the first leg of its quarterfinal 4-3 but lost that advantage in the 31st minute after Eninho scored for Jeonbuk.

Lee put the Koreans ahead for good with the first of four goals, while Kim Dong-chan also scored for Jeonbuk to take the quarterfinal 9-5 on aggregate.

Jeonbuk's lopsided victory surprised even coach Choi Kang-hee.

''Elimination never crossed our minds but then we never thought that we would win by such a big margin,'' Choi said. ''It wasn't just about Lee Dong-gook - the reason we won so convincingly was because the entire team played well.''

Elsewhere, Al Ittihad's staunch defense ensured it advanced after having won the first leg 3-1.

The Saudi club held until former Colombian international Molina curled his shot into the top-right corner of the net for the game's lone goal.

''We knew that it would be a tough game in Seoul as FC Seoul are a very good team,'' coach Dimitri Davidovic said. ''And it was a tough game but it was a very good game for us. There is still a long way to go but tonight we are happy.''

Jeonbuk and Osaka meet for the first-leg of their semifinal on Oct. 19.

In matches to be played Wednesday, Al Sadd of Qatar holds a 3-0 lead over Sepahan after the Asian Football Confederation penalized the Iranian club for fielding an ineligible player by stripping it of its original 1-0 victory. Suwon Samsung Bluewings of South Korea and Zob Ahan of Iran are even at 1-1.