Melanie Oudin sealed the United States' passage to the semi-finals of the Fed Cup on Sunday with a 7-6 (7/3), 6-4 win over Julie Coin to establish an unassailable 3-0 lead over hosts France. Oudin had beaten Pauline Parmentier in straight sets in Saturday's second singles rubber after 140th-ranked Bethanie Mattek-Sands had started the ball rolling with a 7-6 (9/7), 7-5 win over Alize Cornet. That loss being Cornet's sixth loss in as many Fed Cup starts, team captain Nicolas Escude withdrew her from the firing line and sent in Coin. But she was unable to prevent Oudin sealing the decisive point which takes the USA through to the semi-finals as they hone in on an 18th title. In the semis, they will play either Serbia or Russia. 