( dpa ) - Collated results on Friday at Davis Cup World Group quarter-final ties: (x indicates new result).
at Moscow, Russia v Czech Republic
Marat Safin, Russia, def. Tomas Berdych, Czech Republic, 6-7 (5-7), 4-6, 6-3, 6-2, 6-4
Radek Stepanek, Czech Republic, def. Igor Andreev, Russia, 6-3, 6-2, 6-4
Russia level with Czech Republic, 1-1
at Bremen, Germany v Spain
Rafael Nadal, Spain, def. Nicolas Kiefer, Germany, 7-6 (7-), 6-0, 6-3
David Ferrer, Spain, def. Philipp Kohlschreiber, Germany, 6-7 (3-7), 6-3, 6-4, 6-2
Spain lead Germany, 2-0
at Buenos Aires, Argentina v Sweden
David Nalbandian, Argentina, def. Thomas Johansson, Sweden, 6-2, 5-7, 6-4, 6-2
Robin Soderling, Sweden, def. Jose Acasuso, Argentina, 6-0, 6-4, 6-1
Argentina level with Sweden, 1-1
at Winston-Salem, US v France
Andy Roddick, US, def. Michael Llodra, France, 6-4, 7-6 (7-3), 7-6 (7-5)
x James Blake, US, def. Paul-Henri Mathieu, France, 7-6 (7-5), 6-7 (3-7), 6-3, 3-6, 7-5
US lead France, 2-0