Czechs win doubles to go 2-1 up against Argentina BUENOS AIRES (Reuters) - Tomas Berdych and Radek Stepanek put Czech Republic 2-1 up against Argentina with victory in the Davis Cup doubles in their semi-final on clay at Parque Roca on Saturday. The Czech pair beat Eduardo Schwank and Carlos Berlocq 6-3 6-4 6-3 in two hours 37 minutes. Berdych can now secure victory for the visitors in Sunday's opening singles by beating Juan Martin del Potro in a clash between two world top-10 players. Stepanek is scheduled to meet Juan Monaco in the final rubber. The winning team will face holders Spain or United States in the final. Spain lead the Americans 2-1 in Gijon. Reporting by Rex Gowar