BUENOS AIRES, Argentina -- Argentina reached the Davis Cup quarterfinals for a 12th straight time after David Nalbandian and Horacio Zeballos defeated Germany's Christopher Kas and Tobias Kamke in doubles on Saturday.
Leading by an unassailable 3-0 with a day to spare, Argentina will be at home to face France in the quarterfinals in April.
Carlos Berlocq and Juan Monaco gave Argentina a 2-0 lead in Friday's singles.
The day was particularly sweet for Nalbandian, the former Wimbledon finalist who spearheaded the 6-1, 6-4, 5-7, 6-2 victory.
Argentina's top-ranked player, Juan Martin del Potro, elected not to play this round to focus on the tour. Nalbandian and Del Potro have a strained relationship and many expected this Argentine team to lose to Germany.
"We played a great match," Nalbandian said. "We added to the wins on Friday to round out an incredible week. There was talk that we were in danger ... but we showed we are a tough team to beat at home, and that we have great players."
Germany failed to recover from its strange loss in Friday's singles when top player Philipp Kohlschreiber retired in the fifth set with a left hamstring injury despite leading 5-4. He walked off the court and handed the match to Berlocq.
Minutes later he needed help to walk around the training area and could not have played on Sunday had Germany survived the doubles.
Saturday's temperatures were mild, about 27 degrees (80 F), after sweltering heat on Friday reached near 37 (100 F).