Leandro Benitez's double strike inspired Copa Libertadores winners Estudiantes to a 2-1 win over Pohang Steelers to book their place in the Club World Cup final here on Tuesday.
In a fiery encounter Steelers had to play the last quarter of an hour with only eight players.
Goalkeeper Shin Hwa Yong was red-carded for handling the ball outside the area in the 77th minute — Kim Jae-Sung received his second yellow card in the 72nd minute for a foul on Juan Sebastian Veron, and skipper Jae Won saw red in the 56th minute when he was booked for the second time.
Referee Roberto Rosetti issued eight yellow cards and one straight red to the Korean side and two yellows to the South Americans.
Argentina outplayed the South Koreans at the Mohammed Bin Zayed Stadium.
Estudiantes could have taken the lead in the 10th minute when a Mauro Boselli overhead kick found the crossbar. Denilson and Kim Jung-Kyum came close to giving Steelers the lead but their efforts were blocked by Estudiantes goalkeeper Albil.
After a couple of good efforts by Enzo Perez and one by Boselli, Estudiantes went ahead through a Benitez free kick from 25 yards at the stroke of halftime. He made it 2-0 in the 53rd minute when he latched on to a Perez cross and scored from a difficult angle.
Steelers' star striker Denilson cut the deficit in the 71st minute.
Estudiantes now face the winners of Wednesday's other semi-final between Barcelona and Mexico's Atlante in Saturday's final. The South Korean's meanwhile go into the third-place play-off.