Tomas Berdych and Radek Stepanek will play for defending champion Czech Republic when it meets Argentina in next week's Davis Cup semifinals.
In the other semifinal, top-ranked Novak Djokovic will lead Serbia against a Canadian team powered by Milos Raonic. This is the first time Canada has made the World Group semis.
The semifinal winners will meet for the title in November.
In other Davis Cup news, Rafael Nadal next week will play for Spain in a World Group playoff against Ukraine. It's the first time he's playing Davis Cup since his country won the 2011 final.
Berdych was injured and did not play in the Czech Republic's quarterfinal victory at Kazakhstan. Injury also prevented Stepanek from playing in the first-round win at Switzerland.
Lukas Rosol, Jiri Vesely, Jan Hajek are also on the squad announced Tuesday for the Sept 13-15 matches on an indoor hard court at Prague's O2 Arena. Berdych and Stepanek played all five matches when the Czechs beat Spain 3-2 in last year's final in Prague.
In their last series with Argentina, the Czechs won 3-2 in Buenos Aires in the semis last year.
Raonic, ranked No. 11, will be joined for the clay-court matches at Belgrade Arena by veteran Daniel Nestor, Vasek Pospisil and Frank Dancevic. Also on the Serbian team are Janko Tipsarevic, Nenad Zimonjic and Dusan Lajovic.