John Isner beaten in Davis Cup tie in Switzerland . John Isner wins in four sets as Switzerland take 2 -0 lead . ( CNN ) -- Mardy Fish saw off Stanislav Wawrinka in earlier match . Holders United States leading United States 2 -0 in Oviedo .
John Isner beaten in Davis Cup tie in Switzerland . John Isner wins in four sets as Switzerland take 2 -0 lead . Mardy Fish saw off Stanislav Wawrinka in earlier match . Holders United States leading United States 2 -0 in Oviedo .