<p>France were also well placed going into Saturday's doubles after Richard Gasquet clawed back a two-set deficit against Germany's Florian Mayer in Stuttgart as last year's runners-up also won both opening singles.<br /><br />Spain, despite missing deposed world number one Rafael Nadal, took a commanding 2-0 lead over hosts the United States in Austin, Texas.<br /><br />Serbia's clash with Sweden was something of a mismatch. Even with newly-crowned Wimbledon champion and world number one Novak Djokovic pulling out of the singles with a knee niggle, Serbia made short work of the lowly-ranked Swedes, who are without their powerhouse world number five Robin Soderling.<br /><br />Viktor Troicki beat world number 297 Michael Ryderstedt 6-3, 6-1, 6-7, 7-5 before Janko Tipsarevic saw off Ervin Eleskovic in quick time when his opponent retired hurt with a knee injury trailing 6-2, 1-0.<br /><br />Argentina began Friday already 2-0 ahead against Kazakhstan after their tie in Buenos Aires started a day earlier because of municipal elections on Sunday, and the South Americans took a decisive lead when Juan Ignacio Chela and Eduardo Schwank beat Evgeny Korolev and Yuriy Schukin in straight sets.<br /><br />The performance of the day was from Frenchman Gasquet. He trailed by two sets against Mayer but hit back to win 4-6, 4-6, 7-5, 6-3, 6-3 before Gael Monfils then beat Philipp Kohlschreiber 7-6, 7-6, 6-4.<br /><br />In Austin, Feliciano Lopez gave Spain a winning start when he battled past American Mardy Fish 6-4, 3-6, 6-3, 6-7, 8-6 before world number six David Ferrer followed suit with a gutsy 7-6, 7-5, 6-3 victory over hometown favourite Andy Roddick.</p>
<p>France were also well placed going into Saturday's doubles after Richard Gasquet clawed back a two-set deficit against Germany's Florian Mayer in Stuttgart as last year's runners-up also won both opening singles.<br /><br />Spain, despite missing deposed world number one Rafael Nadal, took a commanding 2-0 lead over hosts the United States in Austin, Texas.<br /><br />Serbia's clash with Sweden was something of a mismatch. Even with newly-crowned Wimbledon champion and world number one Novak Djokovic pulling out of the singles with a knee niggle, Serbia made short work of the lowly-ranked Swedes, who are without their powerhouse world number five Robin Soderling.<br /><br />Viktor Troicki beat world number 297 Michael Ryderstedt 6-3, 6-1, 6-7, 7-5 before Janko Tipsarevic saw off Ervin Eleskovic in quick time when his opponent retired hurt with a knee injury trailing 6-2, 1-0.<br /><br />Argentina began Friday already 2-0 ahead against Kazakhstan after their tie in Buenos Aires started a day earlier because of municipal elections on Sunday, and the South Americans took a decisive lead when Juan Ignacio Chela and Eduardo Schwank beat Evgeny Korolev and Yuriy Schukin in straight sets.<br /><br />The performance of the day was from Frenchman Gasquet. He trailed by two sets against Mayer but hit back to win 4-6, 4-6, 7-5, 6-3, 6-3 before Gael Monfils then beat Philipp Kohlschreiber 7-6, 7-6, 6-4.<br /><br />In Austin, Feliciano Lopez gave Spain a winning start when he battled past American Mardy Fish 6-4, 3-6, 6-3, 6-7, 8-6 before world number six David Ferrer followed suit with a gutsy 7-6, 7-5, 6-3 victory over hometown favourite Andy Roddick.</p>