Isner: We'll go into Spain tie confident

After leading the United States to an upset of France on the road in the Davis Cup quarterfinals, John Isner says the American squad has a chance to upend Spain away in September. Spain has won 23 straight ties at home.

"I'm assuming they're going to put it on clay," Isner told reporters. "We've done pretty well in our first two matches. But it's probably leaning towards that way. Just like France, and probably even more so, they can throw anybody out there. They're so deep, that country. But whoever we go up against, whatever the conditions are, we're going to go out there and we're going to believe that we're going to win. That's what we've done these first two rounds. People didn't think we could beat Switzerland. I'm sure there were people that didn't think we could beat France. So we'll go into that match very confident and obviously ready to go."