Serena Williams beats older sister Venus to reach Family Circle Cup final . Argentina took a 2-1 lead at home to France , as David Nalbandian and Horacio Zeballos defeated Julien Benneteau and Michael Llodra 3-6 7-6 ( 7-3 ) 7-5 6-3 in Buenos Aires . World No . 1 triumphs in less than an hour as she continues title defense . Score: 6 Davis Cup champions Czech Republic lose doubles in Kazakhstan .
Serena Williams beats older sister Venus to reach Family Circle Cup final . World No . 1 triumphs in less than an hour as she continues title defense . Score: 6 Davis Cup champions Czech Republic lose doubles in Kazakhstan .