David Nalbandian will open the Davis Cup semifinals Friday against Russia's Igor Andreev, followed by a matchup of Juan Martin del Potro against No. 6 Nikolay Davydenko.
The announcement was made at Thursday's draw.
Saturday's doubles match in Buenos Aires will be Agustin Calleri and Guillermo Canas against Russia's Igor Kunitsyn and Dimitry Tursuno.
Argentina lost to Russia in the Davis Cup final in 2006.