PRAGUE, CZECH REPUBLIC - SEPTEMBER 14:  Radek Stepanek and Tomas Berdych (T) of Czech Republic return a shot in the doubles game against Carlos Berlocq and Horacio Zeballos of Argentina during day two of the Davis Cup semifinal match between Czech Republic and Argentina at the O2 Arena on September 14, 2013 in Prague, Czech Republic.  (Photo by Matej Divizna/Getty Images)