The Czechs clinched the semifinal Saturday when Tomas Berdych and Radek Stepanek teamed to down Argentine counterparts Carlos Berlocq and Horacio Zeballos 6-3, 6-4, 6-2 for an insurmountable 3-0 advantage in the best-of-five semifinal series.
Argentina, meanwhile finished up Sunday with victories by Zeballos over Lukas Rosol, 4-6, 7-6 (8-6), 6-4, and by Leonardo Mayer over Jiri Vesely, 6-4, 6-4.
The Czechs -- who captured their first Davis Cup over Spain last year -- in November will face Serbia, which rallied for a win over Canada in Sunday's other semifinal.
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