Andy Murray is confident that he can win the Davis Cup tie for Great Britain when he faces American John Isner today, according to his brother Jamie.
"I don't think Isner's going to be back-flipping out of bed to play Andy," Jamie Murray told BBC Sport.
"I'd rather be in Andy's shoes than Isner's. I'm sure Andy will be pretty confident.
"I guess with his [Isner's] serve you've always got a chance but I'd never back against Andy in this kind of situation."