OSTRAVA, Czech Republic — Radek Stepanek beat Juan Monaco in the final reverse singles match to give the Czech Republic a 3-2 win over Argentina and a place in the Davis Cup semifinals.

Stepanek won 7-6 (5), 6-3, 6-2 Sunday on the indoor hard court at CEZ Arena.

The Czechs will face the United States or Croatia in the Sept. 18-20 semis.

Earlier Sunday, Juan Martin del Potro defeated Tomas Berdych in the opening reverse singles match 6-4, 6-4, 6-4 to tie the series at 2-2.