The big-serving John Isner says he must serve huge if he is going to have any chance against Roger Federer in the United States' Davis Cup tie against Switzerland on Friday.
"In any match, making a lot of first serves is very important, especially for me,” he told reporters. "I am going to have to serve a high percentage to give myself the best chance of winning. When I do miss a first serve, I am going to have to hit my second serves big. I can’t just roll them in there. He can do everything. He is so talented and has every shot in the book. For me, it is all going to start with my service game. I am going to have to go out there and serve my absolute best to have a shot to win."