Andy Murray beat John Isner in straight sets to secure GB win over US . Murray needed 3 tie-breaks to beat the world No 20 on Sunday . The Scot 's win in Glasgow clinched the Davis Cup tie two-2 . Great Britain will face France at home in July in quarter-finals .
Andy Murray beat John Isner in straight sets to secure GB win over US . Murray needed two tie-breaks to beat the world No 20 on Sunday . The Scot 's win in Glasgow clinched the Davis Cup tie 3-2 . Great Britain will face France at home in July in quarter-finals .