Reigning Davis Cup champions The U.S. team will now face 2008 and 2009 champions Spain in the last eight , after the team lead by world No . 1 Novi Sad progress to the quarterfinals of the competition . Serbia complete a 4 -1 victory over Croatia by winning both reverse singles in Novi Sad . Croatia , USA , Kazakhstan , Spain and the Czech Republic are also through to the last eight . Kazakhstan provide the shock of the fifth round with a 3 -2 win over the Czech Republic .
Reigning Davis Cup champions Novi Sad progress to the quarterfinals of the competition . Serbia complete a 4 -1 victory over Croatia by winning both reverse singles in Novi Sad . Croatia , USA , Kazakhstan , Spain and the Czech Republic are also through to the last eight . Kazakhstan provide the shock of the fifth round with a 3 -2 win over the Czech Republic .