Glasgow: Andy Murray sealed a 3-1 Davis Cup win for Great Britain with a straight-sets victory over American number one John Isner on Sunday.
Murray, the world number five, saved three set points before winning the opener on a tie-break and stayed in control after that to claim a 7-6 (7/4) 6-3 7-6 (7/4) first round victory in Glasgow.
The win clinched a 3-1 triumph over the United States and set up a World Group quarter-final tie against France.
Bob and Mike Bryan had kept the United States in with a chance of a dramatic fightback as they held off a strong challenge from Jamie Murray and Dom Inglot to win 6-3, 6-2, 3-6, 6-7 (8/10), 9-7 on Saturday.
Faced with a 2-0 deficit after Friday`s singles matches, the Bryan brothers knew another loss would condemn the USA to an embarrassingly quick defeat in Glasgow.
The world`s number one doubles team got the job done, but not without a scare as Murray, the brother of Davis Cup team-mate Andy Murray, and Inglot recovered from two sets down.