With less than 10 seconds till the final whistle, Greece had the ball. They were down by 2 points and Vasilis Spanoulis took the ball and tried to seal the win for World Championship runners-up but his shot was wide.
Manu Ginobili and Carlos Delfino were the main weapons for Argentina both scoring above 20 points.
Argentina will try to repeat 2004 semi-final against United States on Friday.
Argentina: Emanuel Ginobili 24, Carlos Delfino 23, Andres Nocioni 12, Luis Scola 11, Pablo Prigioni 7, Leonardo Gutierrez 3.
Greece: Antonis Fotsis 17, Kostas Tsartsaris 13, Ioannis Bouroussis 12, Panagiotis Vasilopoulos 10, Vasilis Spanoulis 9, Dimitris Diamantidis 6, Nikos Zisis 5, Theo Papaloukas 4, Sofoklis Schortsianitis 2.