Davis CupRESULTS

WORLD GROUP

First Round

Winners to second round, April 6-8; losers to WG playoffs, Sept. 14-16

United States 2, Switzerland 0

At Forum Fribourg

Fribourg, Switzerland

Surface: Clay-Indoor

Singles

Mardy Fish, United States, def. Stanislas Wawrinka, Switzerland, 6-2, 4-6, 4-6, 6-1, 9-7.

John Isner, United States, def. Roger Federer, Switzerland, 4-6, 6-3, 7-6 (4), 6-2.

WTAOPEN GAZ DE FRANCE SUEZ

At Paris

Surface: Hard-Indoor

Singles

Quarterfinals

Klara Zakopalova, Czech Republic, def. Julia Goerges (6), Germany, 3-6, 7-5, 6-1.

Angelique Kerber, Germany, def. Maria Sharapova (1), Russia, 6-4, 6-4.

Marion Bartoli (2), France, def. Roberta Vinci (7), Italy, 4-6, 6-4, 7-6 (2).

Yanina Wickmayer, Belgium, def. Mona Barthel, Germany, 6-4, 6-7 (3), 6-3.